warning: attribute should be applied to a function definition --> /tmp/icemaker_global_tempdir.E7eKMRzU4Hi9/rustc_testrunner_tmpdir_reporting.FLqPWoufnRyw/mvce.rs:2:5 | 2 | #[cold] | ^^^^^^^ 3 | 5 | - not a function definition | = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: `#[warn(unused_attributes)]` on by default thread 'rustc' panicked at /rustc-dev/d51b6f97122671c5de27cfc08cded235357e0d97/compiler/rustc_hir/src/hir.rs:1306:18: can't get the span of an arbitrary parsed attribute: Parsed(Cold(/tmp/icemaker_global_tempdir.E7eKMRzU4Hi9/rustc_testrunner_tmpdir_reporting.FLqPWoufnRyw/mvce.rs:2:5: 2:12 (#0))) stack backtrace: 0: 0x77caa6f06d93 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h172786a053088a80 1: 0x77caa7602c3f - core::fmt::write::h7e8ea7c2bf766230 2: 0x77caa6efc9c3 - std::io::Write::write_fmt::h8aef4545d51610bc 3: 0x77caa6f06bf2 - std::sys::backtrace::BacktraceLock::print::hcaf1ccd6afbf2e1d 4: 0x77caa6f0a6ea - std::panicking::default_hook::{{closure}}::h4ce4779ce8a3e31a 5: 0x77caa6f0a26f - std::panicking::default_hook::hafe5dcd1475f74c9 6: 0x77caa5fe51f3 - std[ac406385963d06ba]::panicking::update_hook::<alloc[762d5bb616333adc]::boxed::Box<rustc_driver_impl[2409353bb348a1fe]::install_ice_hook::{closure#1}>>::{closure#0} 7: 0x77caa6f0af3b - std::panicking::rust_panic_with_hook::h2b643051b0ee54bd 8: 0x77caa6f0ac3a - std::panicking::begin_panic_handler::{{closure}}::h2f43df37d8ec1fc9 9: 0x77caa6f07269 - std::sys::backtrace::__rust_end_short_backtrace::hdd0bf39addaa3bbd 10: 0x77caa6f0a91d - __rustc[ec5114c7948ebf25]::rust_begin_unwind 11: 0x77caa36999c0 - core::panicking::panic_fmt::h7cdf2f61e2255620 12: 0x77caa91f14cd - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::precedence::{closure#0}.llvm.1929938728858289850.cold 13: 0x77caa8543865 - <rustc_hir[3d24d229c323ac03]::hir::Expr>::precedence 14: 0x77caa62eb7a9 - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::suggest_deref_ref_or_into 15: 0x77caa62a6b06 - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::emit_type_mismatch_suggestions 16: 0x77caa62ac0b0 - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::emit_coerce_suggestions 17: 0x77caa808487d - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::check_expr_block 18: 0x77caa80b2ee0 - <rustc_hir_typeck[d1b4da71dd966fd5]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args 19: 0x77caa808c197 - rustc_hir_typeck[d1b4da71dd966fd5]::check::check_fn 20: 0x77caa87f6e8f - rustc_hir_typeck[d1b4da71dd966fd5]::typeck_with_inspect::{closure#0} 21: 0x77caa87e39b0 - rustc_query_impl[cdda87a48a29190a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cdda87a48a29190a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[85d0084cd8285b0d]::query::erase::Erased<[u8; 8usize]>> 22: 0x77caa786ee6e - rustc_query_system[c91322fa492962f5]::query::plumbing::try_execute_query::<rustc_query_impl[cdda87a48a29190a]::DynamicConfig<rustc_data_structures[deb77fa27d028d21]::vec_cache::VecCache<rustc_span[d438a3ce0d69ef07]::def_id::LocalDefId, rustc_middle[85d0084cd8285b0d]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[c91322fa492962f5]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[cdda87a48a29190a]::plumbing::QueryCtxt, false> 23: 0x77caa786e809 - rustc_query_impl[cdda87a48a29190a]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace 24: 0x77caa78668ad - rustc_hir_analysis[a2924986fcd3aa06]::check_crate 25: 0x77caa786a927 - rustc_interface[e31b222a2d1d97f1]::passes::analysis 26: 0x77caa786a54b - rustc_query_impl[cdda87a48a29190a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[cdda87a48a29190a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[85d0084cd8285b0d]::query::erase::Erased<[u8; 0usize]>> 27: 0x77caa868ba7c - rustc_query_system[c91322fa492962f5]::query::plumbing::try_execute_query::<rustc_query_impl[cdda87a48a29190a]::DynamicConfig<rustc_query_system[c91322fa492962f5]::query::caches::SingleCache<rustc_middle[85d0084cd8285b0d]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[cdda87a48a29190a]::plumbing::QueryCtxt, false> 28: 0x77caa868b752 - rustc_query_impl[cdda87a48a29190a]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 29: 0x77caa8855dd6 - rustc_interface[e31b222a2d1d97f1]::passes::create_and_enter_global_ctxt::<core[1aae05a66286d11a]::option::Option<rustc_interface[e31b222a2d1d97f1]::queries::Linker>, rustc_driver_impl[2409353bb348a1fe]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0} 30: 0x77caa88474af - rustc_interface[e31b222a2d1d97f1]::interface::run_compiler::<(), rustc_driver_impl[2409353bb348a1fe]::run_compiler::{closure#0}>::{closure#1} 31: 0x77caa88714f8 - std[ac406385963d06ba]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[e31b222a2d1d97f1]::util::run_in_thread_with_globals<rustc_interface[e31b222a2d1d97f1]::util::run_in_thread_pool_with_globals<rustc_interface[e31b222a2d1d97f1]::interface::run_compiler<(), rustc_driver_impl[2409353bb348a1fe]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> 32: 0x77caa88711d6 - <<std[ac406385963d06ba]::thread::Builder>::spawn_unchecked_<rustc_interface[e31b222a2d1d97f1]::util::run_in_thread_with_globals<rustc_interface[e31b222a2d1d97f1]::util::run_in_thread_pool_with_globals<rustc_interface[e31b222a2d1d97f1]::interface::run_compiler<(), rustc_driver_impl[2409353bb348a1fe]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[1aae05a66286d11a]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 33: 0x77caa886f7fd - std::sys::pal::unix::thread::Thread::new::thread_start::hf9e92a00dfd64138 34: 0x77caa22a57eb - <unknown> 35: 0x77caa232918c - <unknown> 36: 0x0 - <unknown> error: 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: please make sure that you have updated to the latest nightly note: rustc 1.90.0-nightly (d51b6f971 2025-06-27) running on x86_64-unknown-linux-gnu query stack during panic: #0 [typeck] type-checking `main` #1 [analysis] running analysis passes on this crate end of query stack warning: 1 warning emitted note: no errors encountered even though delayed bugs were created note: those delayed bugs will now be shown as internal compiler errors error: internal compiler error: coercion error but no error emitted --> /tmp/icemaker_global_tempdir.E7eKMRzU4Hi9/rustc_testrunner_tmpdir_reporting.FLqPWoufnRyw/mvce.rs:3:5 | 3 | 5 | ^ | note: delayed at compiler/rustc_hir_typeck/src/coercion.rs:1642:31 0: <rustc_errors::DiagCtxtInner>::emit_diagnostic 1: <rustc_errors::DiagCtxtHandle>::emit_diagnostic 2: <rustc_span::ErrorGuaranteed as rustc_errors::diagnostic::EmissionGuarantee>::emit_producing_guarantee 3: <rustc_errors::DiagCtxtHandle>::span_delayed_bug::<rustc_span::span_encoding::Span, &str> 4: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_block 5: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args 6: rustc_hir_typeck::check::check_fn 7: rustc_hir_typeck::typeck_with_inspect::{closure#0} 8: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>> 9: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_data_structures::vec_cache::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 10: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace 11: rustc_hir_analysis::check_crate 12: rustc_interface::passes::analysis 13: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>> 14: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false> 15: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 16: rustc_interface::passes::create_and_enter_global_ctxt::<core::option::Option<rustc_interface::queries::Linker>, rustc_driver_impl::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0} 17: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1} 18: std::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()> 19: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 20: std::sys::pal::unix::thread::Thread::new::thread_start 21: <unknown> 22: <unknown> --> /tmp/icemaker_global_tempdir.E7eKMRzU4Hi9/rustc_testrunner_tmpdir_reporting.FLqPWoufnRyw/mvce.rs:3:5 | 3 | 5 | ^ 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: please make sure that you have updated to the latest nightly note: rustc 1.90.0-nightly (d51b6f971 2025-06-27) running on x86_64-unknown-linux-gnu query stack during panic: end of query stack