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[Clang 21] Crash in MicrosoftNumberingContext::getManglingNumber with virtual inheritance on armv7a-none-windows-eabi

clangClang issues not falling into any other categoryClang issues not falling into any other category

Status: Open.

#172991 In llvm/llvm-project;

· vossjannik opened on Dec 19, 2025

Error while cross compiling linux kernel

new issue

Status: Open.

#172988 In llvm/llvm-project;

· sudobomba opened on Dec 19, 2025

Clang crash: UNREACHABLE executed in EmitDeclRefLValue with "DeclRefExpr for Decl not entered in LocalDeclMap"

clang:codegenIR generation bugs: mangling, exceptions, etc.IR generation bugs: mangling, exceptions, etc.

crash-on-invalid

Status: Open.

Bug

#172983 In llvm/llvm-project;

· AbyssStaror opened on Dec 19, 2025

[mlir] FoldTensorCastOfOutputIntoForallOp: Reverses scf.forall return itarg write order (semantic mismatch after canonicalization)

mlir

Status: Open.

#172981 In llvm/llvm-project;

· hesse-x opened on Dec 19, 2025

[libc++] Some compound assignment operators for bitmask types are not <code>constexpr</code> functions

libc++libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.libc++ C++ Standard Library. Not GNU libstdc++. Not libc++abi.

Status: Open.

#172979 In llvm/llvm-project;

· frederick-vs-ja opened on Dec 19, 2025

clang assertion failed in clang::Sema::CreateOverloadedBinOp for binary operations with missing candidates

clang:frontendLanguage frontend issues, e.g. anything involving "Sema"Language frontend issues, e.g. anything involving "Sema"

crash-on-invalid

Status: Open.

Bug

#172978 In llvm/llvm-project;

· AbyssStaror opened on Dec 19, 2025

[LV][EVL] Simplifying the initial value of first-order recurrence phis.

new issue

Status: Open.

#172976 In llvm/llvm-project;

· Mel-Chen opened on Dec 19, 2025

clang assertion `NumInitElements &lt;= NumArrayElements' failed in CGExprAgg.cpp with flexible array member in template struct constructor

clang:codegenIR generation bugs: mangling, exceptions, etc.IR generation bugs: mangling, exceptions, etc.

crash-on-invalid

Status: Open.

Bug

#172974 In llvm/llvm-project;

· AbyssStaror opened on Dec 19, 2025

Mips: should not use $1 for inline asm

new issue

Status: Open.

#172969 In llvm/llvm-project;

· qethu opened on Dec 19, 2025

[clang] [diagnostics] Now the diagnostic message for std headers should mention std module too

clang:diagnosticsNew/improved warning or error message in Clang, but not in clang-tidy or static analyzerNew/improved warning or error message in Clang, but not in clang-tidy or static analyzer

clang:modulesC++20 modules and Clang Header ModulesC++20 modules and Clang Header Modules

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

Status: Open.

#172966 In llvm/llvm-project;

· ChuanqiXu9 opened on Dec 19, 2025

Mips: expandDivRem can be improved

new issue

Status: Open.

#172965 In llvm/llvm-project;

· qethu opened on Dec 19, 2025

[LoongArch] Assertion `getSignificantBits() &lt;= 64 &amp;&amp; "Too many bits for int64_t"' failed.

backend:loongarch

crash-on-valid

Status: Open.

Bug

#172964 In llvm/llvm-project;

· XChy opened on Dec 19, 2025