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clang crash due to missing typename for dependent type

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

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

Status: Open.

Bug

#174301 In llvm/llvm-project;

· pfent opened on Jan 4, 2026

[m68k] ABCD and SBCD instructions not recognized

backend:m68k

new issue

Status: Open.

#174289 In llvm/llvm-project;

· JoaoBaptMG opened on Jan 3, 2026

[clang-tidy] False positive <code>readability-make-member-function-const</code> for <code>union</code>

clang-tidy

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

Status: Open.

#174269 In llvm/llvm-project;

· eisenwave opened on Jan 3, 2026

[clang] Assertion `R.getAsSingle&lt;TemplateDecl&gt;() &amp;&amp; "There should only be one declaration found."' 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

crash-on-invalid

regression:21Regression in 21 releaseRegression in 21 release

Status: Open.

Bug

#174259 In llvm/llvm-project;

· k-arrows opened on Jan 3, 2026

EquivalenceClasses: Sample code incorrect?

documentation

llvm:adt

Status: Open.

#174258 In llvm/llvm-project;

· shevek-google opened on Jan 3, 2026

-Wmissing-designated-field-initializers complains even when the field has a default CTOR

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

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

Status: Open.

#174256 In llvm/llvm-project;

· kcc opened on Jan 3, 2026

xor before constant table lookup should be optimized out

backend:X86

missed-optimization

Status: Open.

#174255 In llvm/llvm-project;

· Validark opened on Jan 3, 2026

RegScavenger Crash in replaceFrameIndicesBackward Due to Invalid MBBI After Frame Instruction Elimination

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

llvm:codegen

Status: Open.

Bug

#174251 In llvm/llvm-project;

· Sightem opened on Jan 2, 2026

[clang-tidy]: <code>bugprone-unchecked-optional-access</code> false-positive if inside a loop we use checked optional value (might be a regression of Dataflow Analysis)

clang-tidy

clang:dataflowClang Dataflow Analysis framework - https://clang.llvm.org/docs/DataFlowAnalysisIntro.htmlClang Dataflow Analysis framework - https://clang.llvm.org/docs/DataFlowAnalysisIntro.html

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

Status: Open.

#174250 In llvm/llvm-project;

· BaLiKfromUA opened on Jan 2, 2026

[clang-tidy] matchers::matchesAnyListedName() confusingly uses regular expression searches in bugprone-use-after-move

clang-tidy

Status: Open.

#174229 In llvm/llvm-project;

· higher-performance opened on Jan 2, 2026

[clang-tidy][false-negative] <code>performance-move-const-arg</code> does not work in function templates

clang-tidy

false-negativeWarning doesn't fire when it shouldWarning doesn't fire when it should

Status: Open.

#174223 In llvm/llvm-project;

· tearfur opened on Jan 2, 2026

<code>xor undef, undef</code> always simplifies to <code>0</code>

new issue

Status: Open.

#174220 In llvm/llvm-project;

· Veeloxfire opened on Jan 2, 2026