toolchain nightly 12-06-2024 introduces crash on compile of crate imgui

[catvir]

Code

This happens when compiling imgui crate. I have no minimal sample, really sorry about that. Happens in nightly-2024-12-06-x86_64-unknown-linux-gnu, but not in nightly-2024-12-05-x86_64-unknown-linux-gnu. Cross-compiling to windows via x86_64-pc-windows-msvc in release mode.

Meta

rustc --version --verbose:

rustc 1.85.0-nightly (c94848c04 2024-12-05)
binary: rustc
commit-hash: c94848c046d29f9a80c09aae758e27e418a289f2
commit-date: 2024-12-05
host: x86_64-unknown-linux-gnu
release: 1.85.0-nightly
LLVM version: 19.1.5

rustc version: 1.85.0-nightly (c94848c04 2024-12-05)
platform: x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C opt-level=3 -C embed-bitcode=no -C linker=lld-link -C strip=debuginfo -C linker-flavor=lld-link

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

query stack during panic:
end of query stack
error: could not compile `imgui` (lib)

Caused by:
  process didn't exit successfully: `$HOME/.rustup/toolchains/nightly-2024-12-06-x86_64-unknown-linux-gnu/bin/rustc --crate-name imgui --edition=2021 $HOME/.cargo/registry/src/index.crates.io-6f17d22bba15001f/imgui-0.12.0/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --diagnostic-width=430 --crate-type lib --emit=dep-info,metadata,link -C opt-level=3 -C embed-bitcode=no --check-cfg 'cfg(docsrs)' --check-cfg 'cfg(feature, values("docking", "freetype", "tables-api", "wasm"))' -C metadata=a703dd8ddd6f681d -C extra-filename=-a703dd8ddd6f681d --out-dir $HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps --target x86_64-pc-windows-msvc -C linker=lld-link -C strip=debuginfo -L dependency=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps -L dependency=$HOME/...edited.../target/release/deps --extern bitflags=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps/libbitflags-2742a12e7b6ada23.rmeta --extern cfg_if=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps/libcfg_if-56ec8c9b8d3288d7.rmeta --extern imgui_sys=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps/libimgui_sys-8dbcf6caa732dece.rmeta --extern mint=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps/libmint-7e410dd043d3309e.rmeta --extern parking_lot=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/deps/libparking_lot-6e5d60e5f4cc318f.rmeta --cap-lints allow -C linker-flavor=lld-link -Lnative=$HOME/.cache/cargo-xwin/xwin/crt/lib/x86_64 -Lnative=$HOME/.cache/cargo-xwin/xwin/sdk/lib/um/x86_64 -Lnative=$HOME/.cache/cargo-xwin/xwin/sdk/lib/ucrt/x86_64 -L native=$HOME/...edited.../target/x86_64-pc-windows-msvc/release/build/imgui-sys-4828f03d529e05b4/out -L native=$HOME/.cargo/registry/src/index.crates.io-6f17d22bba15001f/windows_x86_64_msvc-0.52.6/lib` (exit status: 101)

Error output

thread 'rustc' panicked at compiler/rustc_errors/src/lib.rs:642:17:
`trimmed_def_paths` called, diagnostics were expected but none were emitted. Use `with_no_trimmed_paths` for debugging. This happened in the following `must_produce_diag` call's backtrace:
   0: <rustc_errors::DiagCtxtHandle>::set_must_produce_diag
   1: <rustc_session::session::Session>::record_trimmed_def_paths
   2: rustc_middle::ty::print::pretty::trimmed_def_paths
   3: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::trimmed_def_paths::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
   4: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
   5: rustc_query_impl::query_impl::trimmed_def_paths::get_query_non_incr::__rust_end_short_backtrace
   6: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::Printer>::print_def_path
   7: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_type
   8: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_type
   9: <rustc_type_ir::binder::Binder<rustc_middle::ty::context::TyCtxt, rustc_type_ir::ty_kind::FnSig<rustc_middle::ty::context::TyCtxt>> as core::fmt::Display>::fmt
  10: core::fmt::write
  11: alloc::fmt::format::format_inner
  12: rustc_lint::types::lint_fn_pointer
  13: <rustc_lint::BuiltinCombinedModuleLateLintPass as rustc_lint::passes::LateLintPass>::check_expr
  14: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  15: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  16: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  17: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass>>
  18: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr::{closure#0}
  19: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_body
  20: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  21: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  22: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass>>
  23: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr::{closure#0}
  24: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_body
  25: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_item
  26: rustc_lint::lint_mod
  27: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::lint_mod::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
  28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalModDefId, rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  29: rustc_query_impl::query_impl::lint_mod::get_query_non_incr::__rust_end_short_backtrace
  30: rustc_lint::late::check_crate::{closure#1}
  31: rustc_lint::late::check_crate
  32: rustc_interface::passes::analysis
  33: 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; 1]>>
  34: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  35: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  36: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
  37: 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<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
  38: <<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<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{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}
  39: std::sys::pal::unix::thread::Thread::new::thread_start
  40: start_thread
             at ./nptl/pthread_create.c:447:8
  41: clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

Backtrace

stack backtrace:
   0:     0x758a885e19e5 - std::backtrace::Backtrace::create::hc9f8062bf3c77f3f
   1:     0x758a86b2a2f5 - std::backtrace::Backtrace::force_capture::hcc0245ef259ad413
   2:     0x758a85cb97ce - std[339c42a0e0e1cbc8]::panicking::update_hook::<alloc[4b645d2b808d60e5]::boxed::Box<rustc_driver_impl[a450451a1b077cae]::install_ice_hook::{closure#0}>>::{closure#0}
   3:     0x758a86b41c28 - std::panicking::rust_panic_with_hook::hadbdcb738271374d
   4:     0x758a86b4191a - std::panicking::begin_panic_handler::{{closure}}::hf015953bfb7b98c8
   5:     0x758a86b3f5a9 - std::sys::backtrace::__rust_end_short_backtrace::h8eb8f61d86c09a66
   6:     0x758a86b415dd - rust_begin_unwind
   7:     0x758a837afd10 - core::panicking::panic_fmt::h8558f71ff16f773d
   8:     0x758a880e3338 - <rustc_errors[62adf55eef5ae9ae]::DiagCtxtInner as core[a08a8da589f49b02]::ops::drop::Drop>::drop
   9:     0x758a880e3ff8 - core[a08a8da589f49b02]::ptr::drop_in_place::<rustc_errors[62adf55eef5ae9ae]::DiagCtxt>
  10:     0x758a882995da - core[a08a8da589f49b02]::ptr::drop_in_place::<rustc_session[b09893f5153b3f1a]::parse::ParseSess>
  11:     0x758a8829a560 - core[a08a8da589f49b02]::ptr::drop_in_place::<rustc_interface[b7068c2f67f9e538]::interface::Compiler>
  12:     0x758a88291887 - rustc_interface[b7068c2f67f9e538]::interface::run_compiler::<core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>, rustc_driver_impl[a450451a1b077cae]::run_compiler::{closure#0}>::{closure#1}
  13:     0x758a880dc387 - std[339c42a0e0e1cbc8]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[b7068c2f67f9e538]::util::run_in_thread_with_globals<rustc_interface[b7068c2f67f9e538]::util::run_in_thread_pool_with_globals<rustc_interface[b7068c2f67f9e538]::interface::run_compiler<core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>, rustc_driver_impl[a450451a1b077cae]::run_compiler::{closure#0}>::{closure#1}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>::{closure#0}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>
  14:     0x758a880dc022 - <<std[339c42a0e0e1cbc8]::thread::Builder>::spawn_unchecked_<rustc_interface[b7068c2f67f9e538]::util::run_in_thread_with_globals<rustc_interface[b7068c2f67f9e538]::util::run_in_thread_pool_with_globals<rustc_interface[b7068c2f67f9e538]::interface::run_compiler<core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>, rustc_driver_impl[a450451a1b077cae]::run_compiler::{closure#0}>::{closure#1}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>::{closure#0}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[a08a8da589f49b02]::result::Result<(), rustc_span[cf656b7144c9c5c5]::ErrorGuaranteed>>::{closure#1} as core[a08a8da589f49b02]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  15:     0x758a880db76b - std::sys::pal::unix::thread::Thread::new::thread_start::hc40c233155f425ee
  16:     0x758a8229ca94 - start_thread
                               at ./nptl/pthread_create.c:447:8
  17:     0x758a82329c3c - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
  18:                0x0 - <unknown>

[saethlin]

Does this still crash on the latest nightly? The relevant code has been changed recently.

[catvir]

Unluckily yes,

rustc 1.85.0-nightly (0aeaa5eb2 2024-12-14)
binary: rustc
commit-hash: 0aeaa5eb22180fdf12a8489e63c4daa18da6f236
commit-date: 2024-12-14
host: x86_64-unknown-linux-gnu
release: 1.85.0-nightly
LLVM version: 19.1.5

Here is backtrace:

thread 'rustc' panicked at compiler/rustc_errors/src/lib.rs:646:17:
`trimmed_def_paths` called, diagnostics were expected but none were emitted. Use `with_no_trimmed_paths` for debugging. This happened in the following `must_produce_diag` call's backtrace:
   0: <rustc_errors::DiagCtxtHandle>::set_must_produce_diag
   1: <rustc_session::session::Session>::record_trimmed_def_paths
   2: rustc_middle::ty::print::pretty::trimmed_def_paths
   3: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::trimmed_def_paths::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
   4: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
   5: rustc_query_impl::query_impl::trimmed_def_paths::get_query_non_incr::__rust_end_short_backtrace
   6: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::Printer>::print_def_path
   7: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_type
   8: <rustc_middle::ty::print::pretty::FmtPrinter as rustc_middle::ty::print::pretty::PrettyPrinter>::pretty_print_type
   9: <rustc_type_ir::binder::Binder<rustc_middle::ty::context::TyCtxt, rustc_type_ir::ty_kind::FnSig<rustc_middle::ty::context::TyCtxt>> as core::fmt::Display>::fmt
  10: core::fmt::write
  11: alloc::fmt::format::format_inner
  12: rustc_lint::types::lint_fn_pointer
  13: <rustc_lint::BuiltinCombinedModuleLateLintPass as rustc_lint::passes::LateLintPass>::check_expr
  14: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  15: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  16: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  17: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass>>
  18: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr::{closure#0}
  19: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_body
  20: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  21: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr
  22: rustc_hir::intravisit::walk_block::<rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass>>
  23: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_expr::{closure#0}
  24: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_body
  25: <rustc_lint::late::LateContextAndPass<rustc_lint::BuiltinCombinedModuleLateLintPass> as rustc_hir::intravisit::Visitor>::visit_nested_item
  26: rustc_lint::lint_mod
  27: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::lint_mod::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 0]>>
  28: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::LocalModDefId, rustc_middle::query::erase::Erased<[u8; 0]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  29: rustc_query_impl::query_impl::lint_mod::get_query_non_incr::__rust_end_short_backtrace
  30: rustc_lint::late::check_crate::{closure#1}
  31: rustc_lint::late::check_crate
  32: rustc_interface::passes::analysis
  33: 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]>>
  34: 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>
  35: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  36: rustc_interface::interface::run_compiler::<(), rustc_driver_impl::run_compiler::{closure#0}>::{closure#1}
  37: 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}, ()>
  38: <<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}
  39: std::sys::pal::unix::thread::Thread::new::thread_start
  40: start_thread
             at ./nptl/pthread_create.c:447:8
  41: clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

stack backtrace:
   0:     0x7a7fadf96aaa - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h57c8c3925ce49724
   1:     0x7a7fae813d26 - core::fmt::write::hd591db34e8fefc49
   2:     0x7a7faf8132d1 - std::io::Write::write_fmt::hafb13061963e9b6c
   3:     0x7a7fadf96902 - std::sys::backtrace::BacktraceLock::print::hd6817bcf0b2f34da
   4:     0x7a7fadf98dfa - std::panicking::default_hook::{{closure}}::h63ea7ef0f18efe7e
   5:     0x7a7fadf98c43 - std::panicking::default_hook::h2cff96b5f1f11a61
   6:     0x7a7fad0f0138 - std[1b8edffc354b3989]::panicking::update_hook::<alloc[b79a629e2207f6f2]::boxed::Box<rustc_driver_impl[9fa7216c7b2fdf15]::install_ice_hook::{closure#0}>>::{closure#0}
   7:     0x7a7fadf995b8 - std::panicking::rust_panic_with_hook::h7fa9a8f224b9d5b8
   8:     0x7a7fadf992aa - std::panicking::begin_panic_handler::{{closure}}::h3d3287d2b656a3fc
   9:     0x7a7fadf96f59 - std::sys::backtrace::__rust_end_short_backtrace::hc4e874dc2f50ca08
  10:     0x7a7fadf98f6d - rust_begin_unwind
  11:     0x7a7faabcde00 - core::panicking::panic_fmt::hac5ac125fcb13ef7
  12:     0x7a7faf729eb1 - <rustc_errors[19dd547f96515d19]::DiagCtxtInner as core[83eb7458e699dd0c]::ops::drop::Drop>::drop
  13:     0x7a7faf72b0dc - core[83eb7458e699dd0c]::ptr::drop_in_place::<rustc_errors[19dd547f96515d19]::DiagCtxt>
  14:     0x7a7faf8abdda - core[83eb7458e699dd0c]::ptr::drop_in_place::<rustc_session[8471c9ddb0eceece]::parse::ParseSess>
  15:     0x7a7faf8acd60 - core[83eb7458e699dd0c]::ptr::drop_in_place::<rustc_interface[685a71190dde8c4]::interface::Compiler>
  16:     0x7a7faf8a404c - rustc_interface[685a71190dde8c4]::interface::run_compiler::<(), rustc_driver_impl[9fa7216c7b2fdf15]::run_compiler::{closure#0}>::{closure#1}
  17:     0x7a7faf72ca11 - std[1b8edffc354b3989]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[685a71190dde8c4]::util::run_in_thread_with_globals<rustc_interface[685a71190dde8c4]::util::run_in_thread_pool_with_globals<rustc_interface[685a71190dde8c4]::interface::run_compiler<(), rustc_driver_impl[9fa7216c7b2fdf15]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  18:     0x7a7faf72d448 - <<std[1b8edffc354b3989]::thread::Builder>::spawn_unchecked_<rustc_interface[685a71190dde8c4]::util::run_in_thread_with_globals<rustc_interface[685a71190dde8c4]::util::run_in_thread_pool_with_globals<rustc_interface[685a71190dde8c4]::interface::run_compiler<(), rustc_driver_impl[9fa7216c7b2fdf15]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[83eb7458e699dd0c]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  19:     0x7a7faf72ea01 - std::sys::pal::unix::thread::Thread::new::thread_start::hcf95b8a74a5f5cfe
  20:     0x7a7fa969ca94 - start_thread
                               at ./nptl/pthread_create.c:447:8
  21:     0x7a7fa9729c3c - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
  22:                0x0 - <unknown>

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

[saethlin]

cc @Urgau I'm pretty sure the root cause is this line:

rust/compiler/rustc_lint/src/types.rs

Line 490 in d185062

format!(" as {fn_sig}")

Doing formatting eagerly like this anywhere in the compiler is usually a time bomb, because if formatting happens then is ignored, there's a mechanism you can see in the backtraces to ensure that the compiler crashes.