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Exporting symbols with 8445 characters or more gets them subdivided into multiple symbols on Windows

C-bugCategory: This is a bug.Category: This is a bug.

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

Status: Open.

#148074 In rust-lang/rust;

· Fulgen301 opened on Oct 24, 2025

Is <code>rustc -o</code> supposed to prescribe the *full* filename incl. extensions, or is it only supposed to describe the filename without extensions?

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

O-windows-gnuToolchain: GNU, Operating system: WindowsToolchain: GNU, Operating system: Windows

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#147403 In rust-lang/rust;

· jieyouxu opened on Oct 6, 2025

rustc final stages extremely slow for large programs, with msvc builds (1.89)

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

C-bugCategory: This is a bug.Category: This is a bug.

I-compiletimeIssue: Problems and improvements with respect to compile times.Issue: Problems and improvements with respect to compile times.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

Status: Open.

#145864 In rust-lang/rust;

· raggi opened on Aug 26, 2025

[opt-dist] Profile-guided optimization of LLVM regressed on Windows hosts

A-PGOArea: Profile-guided optimizations (PGO)Area: Profile-guided optimizations (PGO)

C-bugCategory: This is a bug.Category: This is a bug.

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

O-windowsOperating system: WindowsOperating system: Windows

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

Status: Open.

#144318 In rust-lang/rust;

· ognevny opened on Jul 22, 2025

Consider adding Windows Debug Interface Access (DIA) SDK wrappers for PDB analysis

A-run-makeArea: port run-make Makefiles to rmake.rsArea: port run-make Makefiles to rmake.rs

A-test-infraArea: test infrastructure (may span bootstrap/compiletest/more)Area: test infrastructure (may span bootstrap/compiletest/more)

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#143737 In rust-lang/rust;

· jieyouxu opened on Jul 10, 2025

<code>tests/run-make/short-ice/</code> fails on i686 and x86_64 Windows msvc sometimes

A-run-makeArea: port run-make Makefiles to rmake.rsArea: port run-make Makefiles to rmake.rs

A-testsuiteArea: The testsuite used to check the correctness of rustcArea: The testsuite used to check the correctness of rustc

C-bugCategory: This is a bug.Category: This is a bug.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#143198 In rust-lang/rust;

· jieyouxu opened on Jun 29, 2025

link.exe crashed during compilation

A-linkersArea: linkers... you gotta love linkersArea: linkers... you gotta love linkers

C-external-bugCategory: issue that is caused by bugs in software beyond our controlCategory: issue that is caused by bugs in software beyond our control

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#141626 In rust-lang/rust;

· YasushikoX opened on May 27, 2025

regression: <code>rust-lld: error: duplicate symbol: crc32␍</code> etc. on <code>x86_64-pc-windows-msvc</code> for tests depending on crate <code>libz-sys</code>

A-linkageArea: linking into static, shared libraries and binariesArea: linking into static, shared libraries and binaries

C-discussionCategory: Discussion or questions that doesn't represent real issues.Category: Discussion or questions that doesn't represent real issues.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

Status: Open.

#139821 In rust-lang/rust;

· MingweiSamuel opened on Apr 14, 2025

Compiler panicked at 'is_signed on non-scalar ABI' during const evaluation on windows-sys crate

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

C-bugCategory: This is a bug.Category: This is a bug.

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

S-needs-reproStatus: This issue has no reproduction and needs a reproduction to make progress.Status: This issue has no reproduction and needs a reproduction to make progress.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#138971 In rust-lang/rust;

· AqourSoro opened on Mar 26, 2025

unresolved symbol <code>rdl_oom</code> when compiling <code>cdylib</code> crate with <code>no_global_oom_handling</code> on <code>pc-windows-msvc</code> target

-Zfixed-x18Unstable option: -Zfixed-x18Unstable option: -Zfixed-x18

A-allocatorsArea: Custom and system allocatorsArea: Custom and system allocators

A-linkageArea: linking into static, shared libraries and binariesArea: linking into static, shared libraries and binaries

C-bugCategory: This is a bug.Category: This is a bug.

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

#138758 In rust-lang/rust;

· wmmc88 opened on Mar 20, 2025

<code>-C split-debuginfo={off,packed,unpacked}</code> is (effectively) untested on windows-msvc and windows-gnu (well, windows generally)

A-debuginfoArea: Debugging information in compiled programs (DWARF, PDB, etc.)Area: Debugging information in compiled programs (DWARF, PDB, etc.)

A-run-makeArea: port run-make Makefiles to rmake.rsArea: port run-make Makefiles to rmake.rs

A-testsuiteArea: The testsuite used to check the correctness of rustcArea: The testsuite used to check the correctness of rustc

C-bugCategory: This is a bug.Category: This is a bug.

E-hardCall for participation: Hard difficulty. Experience needed to fix: A lot.Call for participation: Hard difficulty. Experience needed to fix: A lot.

O-windows-gnuToolchain: GNU, Operating system: WindowsToolchain: GNU, Operating system: Windows

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#135531 In rust-lang/rust;

· jieyouxu opened on Jan 15, 2025

rustc segfaults on <code>global_asm!("jz [foo]")</code> on x86_64-pc-windows-msvc (exit code: 0xc0000005, STATUS_ACCESS_VIOLATION)

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

C-bugCategory: This is a bug.Category: This is a bug.

I-crashIssue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.Issue: The compiler crashes (SIGSEGV, SIGABRT, etc). Use I-ICE instead when the compiler panics.

O-windowsOperating system: WindowsOperating system: Windows

O-windows-msvcToolchain: MSVC, Operating system: WindowsToolchain: MSVC, Operating system: Windows

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#135362 In rust-lang/rust;

· Trolldemorted opened on Jan 11, 2025