ICE when using tracing::debug!("").await in a non-async fn

[ReactorScram]

Summary

I minimized it to this https://github.com/ReactorScram/rust-ice-repro/blob/main/src/lib.rs
Basically

fn _() {
    tracing::debug!("").await
}

cargo check, cargo build, or cargo clippy all seem to crash similarly.

Version

rustc 1.77.2 (25ef9e3d8 2024-04-09)
binary: rustc
commit-hash: 25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04
commit-date: 2024-04-09
host: aarch64-unknown-linux-gnu
release: 1.77.2
LLVM version: 17.0.6

Error output

Backtrace

thread 'rustc' panicked at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/compiler/rustc_middle/src/hir/mod.rs:145:88:
no entry found for key
stack backtrace:
 0: rust_begin_unwind
           at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/std/src/panicking.rs:647:5
 1: core::panicking::panic_fmt
           at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/panicking.rs:72:14
 2: core::panicking::panic_display
           at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/panicking.rs:196:5
 3: core::panicking::panic_str
           at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/panicking.rs:171:5
 4: core::option::expect_failed
           at /rustc/25ef9e3d85d934b27d9dada2f9dd52b1dc63bb04/library/core/src/option.rs:1988:5
 5: <rustc_middle::hir::provide::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_hir::hir_id::OwnerId)>>::call_once
    [... omitted 2 frames ...]
 6: <rustc_middle::hir::map::Map>::opt_parent_id
 7: <rustc_middle::hir::map::ParentHirIterator as core::iter::traits::iterator::Iterator>::next
 8: <rustc_middle::lint::ShallowLintLevelMap>::probe_for_lint_level
 9: <rustc_middle::lint::ShallowLintLevelMap>::lint_level_id_at_node
10: <rustc_middle::ty::context::TyCtxt>::lint_level_at_node
11: rustc_hir_analysis::check_unused::check_unused_traits
    [... omitted 2 frames ...]
12: rustc_hir_analysis::check_crate
13: rustc_interface::passes::analysis
    [... omitted 2 frames ...]
14: <rustc_middle::ty::context::GlobalCtxt>::enter::<rustc_driver_impl::run_compiler::{closure#0}::{closure#0}::{closure#3}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
15: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#0}::{closure#0}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
16: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

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

[y21]

This is most likely a duplicate of rust-lang/rust#121096 and should already be fixed on nightly.

[ReactorScram]

You're right, cargo +nightly check doesn't have the crash. Thanks!