| Issue |
120793
|
| Summary |
[clang-format] Crash in LeftRightQualifierAlignmentFixer for trailing return type
|
| Labels |
clang-format
|
| Assignees |
|
| Reporter |
mellery451
|
source (main.cpp):
```
template <class T>
inline auto clamp(bool& saturated, T const v, T const lo, T const hi) -> const T
{
if (v < lo)
{
saturated = true;
return lo;
}
else if (v > hi)
{
saturated = true;
return hi;
}
else
{
saturated = false;
}
return v;
}
```
config file (format-config):\
```
Language: Cpp
Standard: c++14
BraceWrapping:
AfterClass: true
AfterCaseLabel: true
AfterControlStatement: true
AfterEnum: true
AfterFunction: true
AfterNamespace: true
AfterStruct: true
AfterUnion: true
BeforeCatch: true
BeforeElse: true
IndentBraces: false
BreakBeforeBraces: Custom
QualifierAlignment: Custom
QualifierOrder: ['static', 'inline', 'friend', 'constexpr', 'type', 'const', 'volatile', 'restrict']
```
cmd:
`clang-format --style="file:format-config" main.cpp`
crash:
```
Stack dump:
0. Program arguments: clang-format --style=file:format-config2 main.cpp
#0 0x00007fd3ae89d370 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libLLVM.so.19.1+0xee0370)
#1 0x00007fd3ae89a2ce SignalHandler(int) Signals.cpp:0:0
#2 0x00007fd3ad4cb520 (/lib/x86_64-linux-gnu/libc.so.6+0x42520)
#3 0x00007fd3b7a6bd33 clang::format::LeftRightQualifierAlignmentFixer::analyzeRight(clang::SourceManager const&, clang::format::AdditionalKeywords const&, clang::tooling::Replacements&, clang::format::FormatToken const*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&, clang::tok::TokenKind) (.cold) QualifierAlignmentFixer.cpp:0:0
#4 0x00007fd3bac52e12 clang::format::LeftRightQualifierAlignmentFixer::fixQualifierAlignment(llvm::SmallVectorImpl<clang::format::AnnotatedLine*>&, clang::format::FormatTokenLexer&, clang::tooling::Replacements&) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libclang-cpp.so.19.1+0x3d8ae12)
#5 0x00007fd3bac52e9a clang::format::LeftRightQualifierAlignmentFixer::analyze(clang::format::TokenAnnotator&, llvm::SmallVectorImpl<clang::format::AnnotatedLine*>&, clang::format::FormatTokenLexer&) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libclang-cpp.so.19.1+0x3d8ae9a)
#6 0x00007fd3bac65305 clang::format::TokenAnalyzer::process(bool) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libclang-cpp.so.19.1+0x3d9d305)
#7 0x00007fd3bac55156 clang::format::addQualifierAlignmentFixerPasses(clang::format::FormatStyle const&, llvm::SmallVectorImpl<std::function<std::pair<clang::tooling::Replacements, unsigned int> (clang::format::Environment const&)>>&)::'lambda0'(clang::format::Environment const&)::operator()(clang::format::Environment const&) const QualifierAlignmentFixer.cpp:0:0
#8 0x00007fd3bac55b05 std::_Function_handler<std::pair<clang::tooling::Replacements, unsigned int> (clang::format::Environment const&), clang::format::addQualifierAlignmentFixerPasses(clang::format::FormatStyle const&, llvm::SmallVectorImpl<std::function<std::pair<clang::tooling::Replacements, unsigned int> (clang::format::Environment const&)>>&)::'lambda0'(clang::format::Environment const&)>::_M_invoke(std::_Any_data const&, clang::format::Environment const&) QualifierAlignmentFixer.cpp:0:0
#9 0x00007fd3bac1f0e6 clang::format::internal::reformat(clang::format::FormatStyle const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>, unsigned int, unsigned int, unsigned int, llvm::StringRef, clang::format::FormattingAttemptStatus*) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libclang-cpp.so.19.1+0x3d570e6)
#10 0x00007fd3bac20fa1 clang::format::reformat(clang::format::FormatStyle const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>, llvm::StringRef, clang::format::FormattingAttemptStatus*) (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/../lib/libclang-cpp.so.19.1+0x3d58fa1)
#11 0x000055956f4ca402 clang::format::format(llvm::StringRef, bool) ClangFormat.cpp:0:0
#12 0x000055956f4c15a0 main (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/clang-format+0xc5a0)
#13 0x00007fd3ad4b2d90 __libc_start_call_main ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
#14 0x00007fd3ad4b2e40 call_init ./csu/../csu/libc-start.c:128:20
#15 0x00007fd3ad4b2e40 __libc_start_main ./csu/../csu/libc-start.c:379:5
#16 0x000055956f4c2715 _start (/home/linuxbrew/.linuxbrew/Cellar/llvm/19.1.6/bin/clang-format+0xd715)
Segmentation fault (core dumped)
```
version:
```
$ clang-format --version
Homebrew clang-format version 19.1.6
```
..but I have also repro'd with a non-homebrew version as well (v19 still)
seems to be associated with the trailing return type, but I didn't experiment much.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
