ICE: Closure in inline const block causes an error.

[lilasta]

Code

Playground

#![feature(inline_const)]

fn main() {
    const { || {} };
}

Meta

rustc --version --verbose:

rustc 1.58.0-nightly (1f12ac872 2021-10-17)
binary: rustc
commit-hash: 1f12ac87296ac61ec002e0243e7ad5a50364da35
commit-date: 2021-10-17
host: x86_64-unknown-linux-gnu
release: 1.58.0-nightly
LLVM version: 13.0.0

Error output

error: internal compiler error: compiler/rustc_trait_selection/src/traits/structural_match.rs:201:17: unexpected type during structural-match checking: [closure@bug.rs:4:13: 4:18]

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1146:9
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 1.58.0-nightly (1f12ac872 2021-10-17) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [mir_const_qualif] const checking `main::{constant#0}`
#1 [eval_to_allocation_raw] const-evaluating + checking `main::{constant#0}`
end of query stack

Backtrace

stack backtrace:
   0: std::panicking::begin_panic
   1: std::panic::panic_any
   2: rustc_errors::HandlerInner::bug
   3: rustc_errors::Handler::bug
   4: rustc_middle::ty::context::tls::with_opt
   5: rustc_middle::util::bug::opt_span_bug_fmt
   6: rustc_middle::util::bug::bug_fmt
   7: <rustc_trait_selection::traits::structural_match::Search as rustc_middle::ty::fold::TypeVisitor>::visit_ty
   8: rustc_infer::infer::InferCtxtBuilder::enter
   9: rustc_trait_selection::traits::structural_match::search_for_structural_match_violation
  10: <rustc_const_eval::transform::check_consts::qualifs::CustomEq as rustc_const_eval::transform::check_consts::qualifs::Qualif>::in_any_value_of_ty
  11: rustc_const_eval::transform::check_consts::check::Checker::qualifs_in_return_place
  12: rustc_mir_transform::mir_const_qualif
  13: core::ops::function::FnOnce::call_once
  14: rustc_query_system::query::plumbing::try_execute_query
  15: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::mir_const_qualif
  16: rustc_const_eval::const_eval::eval_queries::eval_to_allocation_raw_provider
  17: rustc_query_system::query::plumbing::get_query
  18: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::eval_to_allocation_raw
  19: rustc_const_eval::const_eval::eval_queries::eval_to_const_value_raw_provider
  20: rustc_query_system::query::plumbing::get_query
  21: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::eval_to_const_value_raw
  22: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_global_id
  23: rustc_middle::mir::interpret::queries::<impl rustc_middle::ty::context::TyCtxt>::const_eval_resolve
  24: rustc_infer::infer::InferCtxt::const_eval_resolve
  25: rustc_trait_selection::traits::const_evaluatable::is_const_evaluatable
  26: rustc_trait_selection::traits::fulfill::FulfillProcessor::progress_changed_obligations
  27: rustc_data_structures::obligation_forest::ObligationForest<O>::process_obligations
  28: <rustc_trait_selection::traits::fulfill::FulfillmentContext as rustc_infer::traits::engine::TraitEngine>::select_with_constness_where_possible
  29: rustc_typeck::check::fallback::<impl rustc_typeck::check::fn_ctxt::FnCtxt>::type_inference_fallback
  30: rustc_infer::infer::InferCtxtBuilder::enter
  31: rustc_typeck::check::typeck
  32: rustc_query_system::query::plumbing::try_execute_query
  33: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck
  34: rustc_data_structures::sync::par_for_each_in
  35: rustc_typeck::check::typeck_item_bodies
  36: rustc_query_system::query::plumbing::try_execute_query
  37: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::typeck_item_bodies
  38: rustc_session::utils::<impl rustc_session::session::Session>::time
  39: rustc_typeck::check_crate
  40: rustc_interface::passes::analysis
  41: rustc_query_system::query::plumbing::try_execute_query
  42: <rustc_query_impl::Queries as rustc_middle::ty::query::QueryEngine>::analysis
  43: rustc_interface::passes::QueryContext::enter
  44: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
  45: rustc_span::with_source_map
  46: scoped_tls::ScopedKey<T>::set