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Code with complex and bool crashed compiler

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

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

crash-on-valid

floating-pointFloating-point mathFloating-point math

llvm:SelectionDAGSelectionDAGISel as wellSelectionDAGISel as well

Status: Open.

Bug

#166512 In llvm/llvm-project;

· tydeman opened on Nov 5, 2025

-fsanitize=nullability should trigger on uninitialized pointers

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

undefined behaviour

Status: Open.

#165756 In llvm/llvm-project;

· vitalybuka opened on Oct 30, 2025

Invalid std::optional<> value reads sneak past static _and_ dynamic analysis

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

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

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

undefined behaviour

Status: Open.

#156762 In llvm/llvm-project;

· sh1boot opened on Sep 3, 2025

UBSan SEGV during destructor

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#156130 In llvm/llvm-project;

· ndunsworth opened on Aug 30, 2025

[Clang] Trap reasons null check

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#150707 In llvm/llvm-project;

· anthonyhatran opened on Jul 25, 2025

Using the libc++ with ASan and UBSan from apt.llvm.org (issue in __ubsan_handle_dynamic_type_cache_miss? libc++ vs. libstdc++ clash?)

compiler-rt:asanAddress sanitizerAddress sanitizer

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

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

packaging

platform:linux

Status: Open.

#145299 In llvm/llvm-project;

· exoosh opened on Jun 23, 2025

Missed optimisation/UBSAN in chacha reference implementation

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#144964 In llvm/llvm-project;

· nabijaczleweli opened on Jun 19, 2025

ubsan has stopped identifying a mismatch between static and dynamic type of an argument to typeid() and dynamic_cast

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#143065 In llvm/llvm-project;

· ojhunt opened on Jun 6, 2025

std::sort triggers negate-overflow ubsan

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

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

Status: Open.

#141550 In llvm/llvm-project;

· kongy opened on May 27, 2025

[clang] lsan is ignored when used with ubsan

compiler-rt:lsanLeak sanitizerLeak sanitizer

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#138982 In llvm/llvm-project;

· jonathanpoelen opened on May 7, 2025

ubsanitizer does not respect file-prefix-map in messages

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

Status: Open.

#138044 In llvm/llvm-project;

· apache-hb opened on Apr 30, 2025

Clang 20.1.3 UBSAN link on Windows fails on LLVM version update

build-problem

compiler-rt:ubsanUndefined behavior sanitizerUndefined behavior sanitizer

platform:windows

Status: Open.

#137762 In llvm/llvm-project;

· MisterBMisterB opened on Apr 29, 2025