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ICE: Missing value for constant, but no error reported? #110378

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is8ac opened this issue Apr 15, 2023 · 1 comment
Open

ICE: Missing value for constant, but no error reported? #110378

is8ac opened this issue Apr 15, 2023 · 1 comment
Labels
C-bug Category: This is a bug. F-generic_const_exprs `#![feature(generic_const_exprs)]` glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@is8ac
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is8ac commented Apr 15, 2023

Code

#![feature(generic_const_exprs)]

fn foo<const L: usize>(_a: [u8; L], _b: [u8; L]) -> [u8; L + 1] {
    [0_u8; L + 1]
}

fn main() {
    let baz = [[0_u8; 1]; 8];

    let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
    //let _: [u8; 3] = foo(foo(baz[0], baz[1]), foo(baz[2], baz[3]));
}

As shown in the commented line, two levels of nesting compiles, three does not.

Meta

rustc --version --verbose:

rustc 1.70.0-nightly (84dd17b56 2023-04-14)
binary: rustc
commit-hash: 84dd17b56a931a631a23dfd5ef2018fd3ef49108
commit-date: 2023-04-14
host: x86_64-unknown-linux-gnu
release: 1.70.0-nightly
LLVM version: 16.0.2
Error 

$ rustc src/bin/ice3_demo.rs 
warning: the feature `generic_const_exprs` is incomplete and may not be safe to use and/or cause compiler crashes
 --> src/bin/ice3_demo.rs:1:12
  |
1 | #![feature(generic_const_exprs)]
  |            ^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #76560 <https://github.com/rust-lang/rust/issues/76560> for more information
  = note: `#[warn(incomplete_features)]` on by default

error: internal compiler error: no errors encountered even though `delay_span_bug` issued

error: internal compiler error: Missing value for constant, but no error reported?
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
              3: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
              4: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
              5: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             13: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             14: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             15: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             16: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             17: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             18: rustc_hir_typeck::check::check_fn
             19: rustc_hir_typeck::typeck
             20: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             21: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             22: rustc_hir_typeck::typeck_item_bodies
             23: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             24: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             25: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             26: rustc_hir_analysis::check_crate
             27: rustc_interface::passes::analysis
             28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             29: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             30: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             31: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             32: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             33: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             34: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             35: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             36: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             37: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             38: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             39: <unknown>
             40: <unknown>
           

error: internal compiler error: evaluating `ConstKind::Expr` is not currently supported
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
              3: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
              4: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
              5: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_where_possible
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             13: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             14: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             15: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             16: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             17: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             18: rustc_hir_typeck::check::check_fn
             19: rustc_hir_typeck::typeck
             20: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             21: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             22: rustc_hir_typeck::typeck_item_bodies
             23: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             24: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             25: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             26: rustc_hir_analysis::check_crate
             27: rustc_interface::passes::analysis
             28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             29: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             30: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             31: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             32: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             33: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             34: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             35: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             36: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             37: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             38: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             39: <unknown>
             40: <unknown>
           

error: internal compiler error: `report_selection_error` did not emit an error
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
              3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
              4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             13: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             14: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             15: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             16: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             17: rustc_hir_typeck::check::check_fn
             18: rustc_hir_typeck::typeck
             19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             20: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             21: rustc_hir_typeck::typeck_item_bodies
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             24: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             25: rustc_hir_analysis::check_crate
             26: rustc_interface::passes::analysis
             27: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             28: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             29: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             30: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             31: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             32: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             33: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             34: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             35: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             36: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             37: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             38: <unknown>
             39: <unknown>
           

error: internal compiler error: `ErrorGuaranteed` without an error
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
              3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
              4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             13: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             14: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             15: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             16: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             17: rustc_hir_typeck::check::check_fn
             18: rustc_hir_typeck::typeck
             19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             20: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             21: rustc_hir_typeck::typeck_item_bodies
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             24: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             25: rustc_hir_analysis::check_crate
             26: rustc_interface::passes::analysis
             27: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             28: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             29: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             30: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             31: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             32: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             33: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             34: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             35: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             36: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             37: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             38: <unknown>
             39: <unknown>
           

error: internal compiler error: expected fullfillment errors
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
             3: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             4: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
            10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
            12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
            13: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            14: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
            15: rustc_hir_typeck::check::check_fn
            16: rustc_hir_typeck::typeck
            17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            18: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            19: rustc_hir_typeck::typeck_item_bodies
            20: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            21: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            22: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            23: rustc_hir_analysis::check_crate
            24: rustc_interface::passes::analysis
            25: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            26: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            27: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            28: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
            29: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
            30: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            31: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            32: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            33: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            34: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            35: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
            36: <unknown>
            37: <unknown>
          

error: internal compiler error: Missing value for constant, but no error reported?
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
              3: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
              4: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             12: rustc_hir_typeck::check::check_fn
             13: rustc_hir_typeck::typeck
             14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             15: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             16: rustc_hir_typeck::typeck_item_bodies
             17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             19: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             20: rustc_hir_analysis::check_crate
             21: rustc_interface::passes::analysis
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             25: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             26: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             27: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             28: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             29: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             31: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             32: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             33: <unknown>
             34: <unknown>
           

error: internal compiler error: evaluating `ConstKind::Expr` is not currently supported
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
              3: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
              4: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             12: rustc_hir_typeck::check::check_fn
             13: rustc_hir_typeck::typeck
             14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             15: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             16: rustc_hir_typeck::typeck_item_bodies
             17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             19: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             20: rustc_hir_analysis::check_crate
             21: rustc_interface::passes::analysis
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             25: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             26: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             27: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             28: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             29: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             31: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             32: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             33: <unknown>
             34: <unknown>
           

error: internal compiler error: `report_selection_error` did not emit an error
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
              3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
              4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             12: rustc_hir_typeck::check::check_fn
             13: rustc_hir_typeck::typeck
             14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             15: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             16: rustc_hir_typeck::typeck_item_bodies
             17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             19: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             20: rustc_hir_analysis::check_crate
             21: rustc_interface::passes::analysis
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             25: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             26: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             27: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             28: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             29: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             31: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             32: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             33: <unknown>
             34: <unknown>
           

error: internal compiler error: `ErrorGuaranteed` without an error
  --> src/bin/ice3_demo.rs:10:73
   |
10 |     let _: [u8; 4] = foo(foo(foo(baz[0], baz[1]), foo(baz[2], baz[3])), foo(foo(baz[4], baz[5]), foo(baz[6], baz[7])));
   |                                                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
              1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
              2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_selection_error
              3: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::InferCtxtPrivExt>::report_fulfillment_error
              4: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
              5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
              6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
              7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
              8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
              9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
             12: rustc_hir_typeck::check::check_fn
             13: rustc_hir_typeck::typeck
             14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
             15: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
             16: rustc_hir_typeck::typeck_item_bodies
             17: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
             18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
             19: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
             20: rustc_hir_analysis::check_crate
             21: rustc_interface::passes::analysis
             22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
             23: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
             24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             25: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             26: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             27: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             28: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             29: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             30: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             31: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
             32: std::sys::unix::thread::Thread::new::thread_start
                        at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
             33: <unknown>
             34: <unknown>
           

error: internal compiler error: expected fullfillment errors
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_infer::infer::error_reporting::TypeErrCtxt as rustc_trait_selection::traits::error_reporting::TypeErrCtxtExt>::report_fulfillment_errors
             3: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             4: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_decl
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_return_expr
            10: rustc_hir_typeck::check::check_fn
            11: rustc_hir_typeck::typeck
            12: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck, rustc_query_impl::plumbing::QueryCtxt>
            13: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_hir_typeck::typeck_item_bodies::{closure#0}>::{closure#0}>
            14: rustc_hir_typeck::typeck_item_bodies
            15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::typeck_item_bodies, rustc_query_impl::plumbing::QueryCtxt>
            16: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
            17: <rustc_session::session::Session>::time::<(), rustc_hir_analysis::check_crate::{closure#7}>
            18: rustc_hir_analysis::check_crate
            19: rustc_interface::passes::analysis
            20: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            21: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            22: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            23: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
            24: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
            25: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            26: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            27: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            28: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            29: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            30: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
            31: <unknown>
            32: <unknown>
          

<truncated to fit in Github comment limit>

error: internal compiler error: broken MIR in DefId(0:9 ~ ice3_demo[6971]::main) (LocalDecl { mutability: Mut, local_info: Set(Boring), internal: false, ty: [type error], user_ty: None, source_info: SourceInfo { span: src/bin/ice3_demo.rs:7:1: 7:10 (#0), scope: scope[0] } }): bad type [type error]
 --> src/bin/ice3_demo.rs:7:1
  |
7 | fn main() {
  | ^^^^^^^^^
  |
  = note: delayed at    0: <rustc_errors::HandlerInner>::emit_diagnostic
             1: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, &str>
             2: <rustc_borrowck::type_check::TypeVerifier as rustc_middle::mir::visit::Visitor>::visit_body
             3: rustc_borrowck::nll::compute_regions
             4: rustc_borrowck::do_mir_borrowck
             5: rustc_borrowck::mir_borrowck
             6: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
             7: rustc_data_structures::sync::par_for_each_in::<&[rustc_span::def_id::LocalDefId], <rustc_middle::hir::map::Map>::par_body_owners<rustc_interface::passes::analysis::{closure#2}::{closure#0}>::{closure#0}>
             8: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
             9: rustc_interface::passes::analysis
            10: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
            11: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
            12: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}::{closure#4}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            13: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
            14: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
            15: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            16: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            17: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            18: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            19: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/alloc/src/boxed.rs:1973:9
            20: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/84dd17b56a931a631a23dfd5ef2018fd3ef49108/library/std/src/sys/unix/thread.rs:108:17
            21: <unknown>
            22: <unknown>
          

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.70.0-nightly (84dd17b56 2023-04-14) running on x86_64-unknown-linux-gnu

query stack during panic:
end of query stack
error: aborting due to 14 previous errors; 1 warning emitted

@is8ac is8ac added C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Apr 15, 2023
@jyn514 jyn514 changed the title error: internal compiler error: no errors encountered even though delay_span_bug issued ICE: Missing value for constant, but no error reported? Apr 15, 2023
@jyn514 jyn514 added the F-generic_const_exprs `#![feature(generic_const_exprs)]` label Apr 15, 2023
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searched toolchains nightly-2022-11-19 through nightly-2023-04-16
Regression in nightly-2022-11-27

searched toolchains 8681d4c through 80a9646

Regression in aff003b

#99798 cc @JulianKnodt

@TaKO8Ki TaKO8Ki self-assigned this May 2, 2023
@rust-lang-glacier-bot rust-lang-glacier-bot added the glacier ICE tracked in rust-lang/glacier. label Jul 14, 2023
@matthiaskrgr matthiaskrgr mentioned this issue Nov 25, 2023
Open
@matthiaskrgr matthiaskrgr added the S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. label Apr 15, 2024
@matthiaskrgr matthiaskrgr mentioned this issue Aug 1, 2024
Open
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C-bug Category: This is a bug. F-generic_const_exprs `#![feature(generic_const_exprs)]` glacier ICE tracked in rust-lang/glacier. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-incomplete-features S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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