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clang-tidy 21.1.2 crashes on JUCE-based GhostLatheProcessor.cpp

clang-tidy

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#163487 In llvm/llvm-project;

· DavidDanielSauce opened on Oct 15, 2025

[clang] Assertion `Result && "Could not evaluate expression"' failed.

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

confirmedVerified by a second partyVerified by a second party

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#161082 In llvm/llvm-project;

· k-arrows opened on Sep 28, 2025

[clang-tidy] <code>misc-const-correctness</code> false positive

clang-tidy

false-positiveWarning fires when it should notWarning fires when it should not

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#157730 In llvm/llvm-project;

· firewave opened on Sep 9, 2025

[Clang][Regression:21] Rejects valid lambda invocation in constexpr if

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

constexprAnything related to constant evaluationAnything related to constant evaluation

lambdaC++11 lambda expressionsC++11 lambda expressions

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

#156579 In llvm/llvm-project;

· MagentaTreehouse opened on Sep 3, 2025

Clang 21: unreachable produced when compiling OpenCL C for NVPTX target

backend:NVPTX

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

OpenCL

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

#154772 In llvm/llvm-project;

· franz opened on Aug 21, 2025

[analyzer] Assertion `detail::isPresent(Val) &amp;&amp; "dyn_cast on a non-existent value"' failed.

clang:static analyzer

confirmedVerified by a second partyVerified by a second party

crashPrefer [crash-on-valid] or [crash-on-invalid]Prefer [crash-on-valid] or [crash-on-invalid]

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#154042 In llvm/llvm-project;

· k-arrows opened on Aug 18, 2025

perl 5.40.2 fails to run simple script when compiled with Clang-21.1.0-rc2

llvm:optimizations

miscompilation

needs-reductionLarge reproducer that should be reduced into a simpler formLarge reproducer that should be reduced into a simpler form

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#152241 In llvm/llvm-project;

· kraj opened on Aug 6, 2025

· 

LLVM 21.x Release

Template argument limit of 0x7fff in clang-21 onward

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

miscompilation

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#151784 In llvm/llvm-project;

· jameswplayer opened on Aug 1, 2025

[clang] 21.1.0-rc2: compilation error due to misdetecting returning function as noreturn

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

false-positiveWarning fires when it should notWarning fires when it should not

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

#151742 In llvm/llvm-project;

· BtbN opened on Aug 1, 2025

Error: the type of variable template specialization declared with deduced type depends on itself

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

diverges-from:gccDoes the clang frontend diverge from gcc on this issueDoes the clang frontend diverge from gcc on this issue

diverges-from:msvcDoes the clang frontend diverge from msvc on this issueDoes the clang frontend diverge from msvc on this issue

lambdaC++11 lambda expressionsC++11 lambda expressions

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

#147992 In llvm/llvm-project;

· Eczbek opened on Jul 10, 2025