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[libc++] Accepts invalid <code>struct _Atomic(T)</code> because <code>_Atomic</code> expands to a class template

accepts-invalid

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

Status: Open.

Bug

#168579 In llvm/llvm-project;

· eisenwave opened on Nov 18, 2025

Type of capture is broken in body of lambda with explicit object parameter

accepts-invalid

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

lambdaC++11 lambda expressionsC++11 lambda expressions

Status: Open.

#163582 In llvm/llvm-project;

· xiaosa-zhz opened on Oct 15, 2025

IR verifier does not enforce metadata structure of read_register/write_register operands

accepts-invalid

llvm:ir

Status: Open.

Bug

#162415 In llvm/llvm-project;

· arsenm opened on Oct 8, 2025

Clang accepts incorrect template decl

accepts-invalid

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

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

Status: Open.

#161514 In llvm/llvm-project;

· wangbo15 opened on Oct 1, 2025

<code>s0</code> clobber in inline assembly generates incorrect code when used with VLA

accepts-invalid

backend:RISC-V

Status: Open.

#157694 In llvm/llvm-project;

· nbdd0121 opened on Sep 9, 2025

[libc++] Hard errors caused by narrowing conversions in list-initialization are suppressed

accepts-invalid

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

Status: Open.

#155962 In llvm/llvm-project;

· frederick-vs-ja opened on Aug 29, 2025

[Clang] Clang incorrectly accepts invalid lambda in default argument that references function parameter

accepts-invalid

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

diverges-from:edgDoes the clang frontend diverge from edg compiler on this issueDoes the clang frontend diverge from edg compiler on this issue

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

generated by fuzzer

lambdaC++11 lambda expressionsC++11 lambda expressions

regression:19Regression in 19 releaseRegression in 19 release

Status: Open.

Bug

#152467 In llvm/llvm-project;

· Xniao opened on Aug 7, 2025

Clang accepts invalid parenthesized template name in deduction guide declaration

accepts-invalid

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

Status: Open.

#152019 In llvm/llvm-project;

· zygoloid opened on Aug 4, 2025

Clang accepts invalid parenthesized constructor declarator

accepts-invalid

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

Status: Open.

#152018 In llvm/llvm-project;

· zygoloid opened on Aug 4, 2025

[clang] Accepts-invalid (?) in discarded statement with return type deduction

accepts-invalid

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

Status: Open.

#151242 In llvm/llvm-project;

· efriedma-quic opened on Jul 29, 2025

[LLD][RISCV] LLD RISC-V relaxation bug

accepts-invalid

lld

Status: Open.

#149583 In llvm/llvm-project;

· luismarques opened on Jul 18, 2025

C++: accepts invalid export module

accepts-invalid

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

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

Status: Open.

#146469 In llvm/llvm-project;

· pinskia opened on Jul 1, 2025