martong added a comment.
I am not sure, but maybe this patch causes an undefined behavior?
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/40472/steps/check-clang%20ubsan/logs/stdio
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Serialization/ASTReader.cpp:6327:28:
runtime error: load of misaligned address 0x7feac40a55bc for type 'const
uint64_t' (aka 'const unsigned long'), which requires 8 byte alignment
0x7feac40a55bc: note: pointer points here
00 00 00 00 a3 c7 01 00 00 00 00 00 0c c8 01 00 00 00 00 00 29 c8 01 00
00 00 00 00 7a cc 01 00
^
#0 0x3be2fe4 in clang::ASTReader::TypeCursorForIndex(unsigned int)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Serialization/ASTReader.cpp:6327:28
#1 0x3be30a0 in clang::ASTReader::readTypeRecord(unsigned int)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Serialization/ASTReader.cpp:6348:24
#2 0x3bd3d4a in clang::ASTReader::GetType(unsigned int)
/b/sanitizer-x86_64-linux-fast/build/llvm-project/clang/lib/Serialization/ASTReader.cpp:6985:26
...
(I am in the blamelist too of that build, so that's why I am sniffing.)
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D76594/new/
https://reviews.llvm.org/D76594
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