ICE: "cannot convert ReErased to a region vid"

[yvt]

Code

#![feature(asm_sym)]
core::arch::global_asm!("/* {} */", sym<&'static ()>::clone);

(Playground)

Meta

rustc --version --verbose:

rustc 1.62.0-nightly (de1bc0008 2022-04-21)
binary: rustc
commit-hash: de1bc0008be096cf7ed67b93402250d3b3e480d0
commit-date: 2022-04-21
host: aarch64-apple-darwin
release: 1.62.0-nightly
LLVM version: 14.0.1

Error output

error: internal compiler error: compiler/rustc_borrowck/src/universal_regions.rs:807:36: cannot convert `ReErased` to a region vid

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/de1bc0008be096cf7ed67b93402250d3b3e480d0/compiler/rustc_errors/src/lib.rs:1313:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

note: the compiler unexpectedly panicked. this is a bug.

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 1.62.0-nightly (de1bc0008 2022-04-21) running on aarch64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [mir_borrowck] borrow-checking `{misc#1}::{constant#0}`
#1 [analysis] running analysis passes on this crate
end of query stack

Backtrace

error: internal compiler error: compiler/rustc_borrowck/src/universal_regions.rs:807:36: cannot convert `ReErased` to a region vid

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/de1bc0008be096cf7ed67b93402250d3b3e480d0/compiler/rustc_errors/src/lib.rs:1313:9
stack backtrace:
   0: std::panicking::begin_panic::<rustc_errors::ExplicitBug>
   1: std::panic::panic_any::<rustc_errors::ExplicitBug>
   2: <rustc_errors::HandlerInner>::bug::<&alloc::string::String>
   3: <rustc_errors::Handler>::bug::<&alloc::string::String>
   4: rustc_middle::ty::context::tls::with_opt::<rustc_middle::util::bug::opt_span_bug_fmt<rustc_span::span_encoding::Span>::{closure#0}, ()>
   5: rustc_middle::util::bug::opt_span_bug_fmt::<rustc_span::span_encoding::Span>
   6: rustc_middle::util::bug::bug_fmt
   7: <rustc_borrowck::universal_regions::UniversalRegionIndices>::to_region_vid
   8: <rustc_borrowck::universal_regions::UniversalRegionIndices>::fold_to_region_vids::<rustc_middle::ty::sty::Binder<rustc_middle::ty::sty::FnSig>>::{closure#0}
   9: <rustc_middle::ty::Ty as rustc_middle::ty::fold::TypeFoldable>::super_fold_with::<rustc_middle::ty::fold::RegionFolder>
  10: <&rustc_middle::ty::list::List<rustc_middle::ty::subst::GenericArg> as rustc_middle::ty::fold::TypeFoldable>::try_fold_with::<rustc_middle::ty::fold::RegionFolder>
  11: <rustc_middle::ty::Ty as rustc_middle::ty::fold::TypeFoldable>::super_fold_with::<rustc_middle::ty::fold::RegionFolder>
  12: <rustc_borrowck::universal_regions::UniversalRegions>::new
  13: rustc_borrowck::nll::replace_regions_in_mir
  14: rustc_borrowck::do_mir_borrowck
  15: <rustc_infer::infer::InferCtxtBuilder>::enter::<rustc_middle::mir::query::BorrowCheckResult, rustc_borrowck::mir_borrowck::{closure#0}>
  16: rustc_borrowck::mir_borrowck
  17: <rustc_borrowck::provide::{closure#0} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId)>>::call_once
  18: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>
  19: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalDefId, &rustc_middle::mir::query::BorrowCheckResult>>
  20: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::mir_borrowck, rustc_query_impl::plumbing::QueryCtxt>
  21: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_interface::passes::analysis::{closure#2}::{closure#0}>
  22: <rustc_session::session::Session>::time::<(), rustc_interface::passes::analysis::{closure#2}>
  23: rustc_interface::passes::analysis
  24: <rustc_query_system::dep_graph::graph::DepGraph<rustc_middle::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle::ty::context::TyCtxt, (), core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  25: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::plumbing::QueryCtxt, rustc_query_system::query::caches::DefaultCache<(), core::result::Result<(), rustc_errors::ErrorGuaranteed>>>
  26: rustc_query_system::query::plumbing::get_query::<rustc_query_impl::queries::analysis, rustc_query_impl::plumbing::QueryCtxt>
  27: <rustc_interface::passes::QueryContext>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}::{closure#3}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
  28: <rustc_interface::interface::Compiler>::enter::<rustc_driver::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_errors::ErrorGuaranteed>>
  29: rustc_span::with_source_map::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_interface::interface::create_compiler_and_run<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#1}>
  30: rustc_interface::interface::create_compiler_and_run::<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>
  31: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_errors::ErrorGuaranteed>, rustc_driver::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_errors::ErrorGuaranteed>>
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

note: the compiler unexpectedly panicked. this is a bug.

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 1.62.0-nightly (de1bc0008 2022-04-21) running on aarch64-apple-darwin

note: compiler flags: --crate-type lib -C embed-bitcode=no -C split-debuginfo=unpacked -C debuginfo=2 -C incremental

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [mir_borrowck] borrow-checking `{misc#1}::{constant#0}`
#1 [analysis] running analysis passes on this crate
end of query stack

[nbdd0121]

This looks similar to #78174 (before inline const type inference is implemented). Essentially the problem is that in rustc_typeck::collect::type_of, tcx.typeck(def_id).node_type(hir_id) is used, and this returns erased lifetme.

[istankovic]

Still present in 1.75-nightly.