Compiling -> "thread 'coordinator' panicked"

Code

Just the whole project. if needed i can share but no idea where the bug is.

Meta

rustc --version --verbose:

rustc 1.79.0 (129f3b996 2024-06-10)
binary: rustc
commit-hash: 129f3b9964af4d4a709d1383930ade12dfe7c081
commit-date: 2024-06-10
host: x86_64-pc-windows-msvc
release: 1.79.0
LLVM version: 18.1.7

Error output

thread 'coordinator' panicked at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081\compiler\rustc_codegen_ssa\src\back\write.rs:1638:29:
/rustc/129f3b9964af4d4a709d1383930ade12dfe7c081\compiler\rustc_codegen_ssa\src\back\write.rs:1638:29: worker thread panicked     
stack backtrace:
   0:     0x7ffb57ea3c48 - std::backtrace_rs::backtrace::dbghelp64::trace
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\..\..\backtrace\src\backtrace\dbghelp64.rs:91
   1:     0x7ffb57ea3c48 - std::backtrace_rs::backtrace::trace_unsynchronized
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\..\..\backtrace\src\backtrace\mod.rs:66
   2:     0x7ffb57ea3c48 - std::sys_common::backtrace::_print_fmt
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\sys_common\backtrace.rs:68     
   3:     0x7ffb57ea3c48 - std::sys_common::backtrace::_print::impl$0::fmt
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\sys_common\backtrace.rs:44     
   4:     0x7ffb57ed4f09 - core::fmt::rt::Argument::fmt
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\core\src\fmt\rt.rs:165
   5:     0x7ffb57ed4f09 - core::fmt::write
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\core\src\fmt\mod.rs:1157
   6:     0x7ffb57e9a3e1 - std::io::Write::write_fmt<std::sys::pal::windows::stdio::Stderr>
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\io\mod.rs:1832
   7:     0x7ffb57ea3a26 - std::sys_common::backtrace::print
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\sys_common\backtrace.rs:34     
   8:     0x7ffb57ea6b88 - std::panicking::default_hook::closure$1
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\panicking.rs:271
   9:     0x7ffb57ea67f7 - std::panicking::default_hook
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\panicking.rs:298
  10:     0x7ffb49f9fdfe - __longjmp_internal
  11:     0x7ffb57ea71b7 - alloc::boxed::impl$50::call
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\alloc\src\boxed.rs:2036
  12:     0x7ffb57ea71b7 - std::panicking::rust_panic_with_hook
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\panicking.rs:799
  13:     0x7ffb4b100734 - ar_archive_writer[96f46fe156109c5a]::archive_writer::write_symbols
  14:     0x7ffb4b0f6029 - ar_archive_writer[96f46fe156109c5a]::archive_writer::write_symbols
  15:     0x7ffb4b0e3c13 - ar_archive_writer[96f46fe156109c5a]::archive_writer::write_symbols
  16:     0x7ffb4b195c6d - rustc_middle[9a5583d0f984d223]::util::bug::bug_fmt
  17:     0x7ffb4b1767bd - rustc_middle[9a5583d0f984d223]::ty::consts::const_param_default
  18:     0x7ffb4b1765fd - rustc_middle[9a5583d0f984d223]::ty::consts::const_param_default
  19:     0x7ffb4b195ba2 - rustc_middle[9a5583d0f984d223]::util::bug::bug_fmt
  20:     0x7ffb48d153a6 - <rustc_interface[5039fedd6fed528e]::passes::LintStoreExpandImpl as rustc_expand[8a362ccb6e11b5d0]::base::LintStoreExpand>::pre_expansion_lint
  21:     0x7ffb45d79bfb - llvm::DenseMap<llvm::StructType * __ptr64,llvm::detail::DenseSetEmpty,llvm::IRMover::StructTypeKeyInfo,llvm::detail::DenseSetPair<llvm::StructType * __ptr64> >::~DenseMap<llvm::StructType * __ptr64,llvm::detail::DenseSetEmpty,llvm::IRMover::StructTypeKeyI
  22:     0x7ffb45d8568d - llvm::DenseMap<llvm::StructType * __ptr64,llvm::detail::DenseSetEmpty,llvm::IRMover::StructTypeKeyInfo,llvm::detail::DenseSetPair<llvm::StructType * __ptr64> >::~DenseMap<llvm::StructType * __ptr64,llvm::detail::DenseSetEmpty,llvm::IRMover::StructTypeKeyI
  23:     0x7ffb57eb822d - alloc::boxed::impl$48::call_once
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\alloc\src\boxed.rs:2022
  24:     0x7ffb57eb822d - alloc::boxed::impl$48::call_once
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\alloc\src\boxed.rs:2022
  25:     0x7ffb57eb822d - std::sys::pal::windows::thread::impl$0::new::thread_start
                               at /rustc/129f3b9964af4d4a709d1383930ade12dfe7c081/library\std\src\sys\pal\windows\thread.rs:52   
  26:     0x7ffbb8b07374 - BaseThreadInitThunk
  27:     0x7ffbb965cc91 - RtlUserThreadStart

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: rustc 1.79.0 (129f3b996 2024-06-10) running on x86_64-pc-windows-msvc

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

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

query stack during panic:
end of query stack
error: cached cgu 58qpz0sqetpnq1gt should have an object file, but doesn't

error: could not compile `test-arca-ws` (bin "test-arca-ws") due to 1 previous error

running it with "RUST_BACKTRACE=1" gives exactly the same msg

Start by reproducing the reported cargo build failure for test-arca-ws on x86_64-pc-windows-msvc, then inspect compiler/rustc_codegen_ssa/src/back/write.rs around line 1638 and the reported ar_archive_writer frames. The issue needs a minimal verifiable example and enough information to identify whether the compiler ICE is reproducible; done means a reduced reproducer and a confirmed diagnosis or fix.