| Issue |
171986
|
| Summary |
Clang-format crash on header template file
|
| Labels |
clang-format
|
| Assignees |
|
| Reporter |
BoelGerhardt
|
Segmentation fault when running clang format (v 19) on a template header file. See below for stacktrace running on file.h containing only the problematic line.
```
$ clang-format --version
clang-format version 19.1.7 ( 19.1.7-2.module+el8.10.0+23045+e1f8e80e)
$ cat /etc/redhat-release
Red Hat Enterprise Linux release 8.10 (Ootpa)
```
```
$ clang-format file.h
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: clang-format file.h
#0 0x00007fbdbb9904fc llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/lib64/libLLVM.so.19.1+0xd984fc)
#1 0x00007fbdbb98db24 llvm::sys::RunSignalHandlers() (/lib64/libLLVM.so.19.1+0xd95b24)
#2 0x00007fbdbb98ea55 (/lib64/libLLVM.so.19.1+0xd96a55)
#3 0x00007fbdc6f7f990 __restore_rt (/lib64/libpthread.so.0+0x12990)
#4 0x00007fbdc5dffa6c clang::format::FormatToken::isBlockIndentedInitRBrace(clang::format::FormatStyle const&) const (/lib64/libclang-cpp.so.19.1+0x3b12a6c)
#5 0x00007fbdc5dd9b1b clang::format::ContinuationIndenter::mustBreak(clang::format::LineState const&) (/lib64/libclang-cpp.so.19.1+0x3aecb1b)
#6 0x00007fbdc5e531ac (/lib64/libclang-cpp.so.19.1+0x3b661ac)
#7 0x00007fbdc5e4f7fe clang::format::UnwrappedLineFormatter::format(llvm::SmallVectorImpl<clang::format::AnnotatedLine*> const&, bool, int, bool, unsigned int, unsigned int, unsigned int) (/lib64/libclang-cpp.so.19.1+0x3b627fe)
#8 0x00007fbdc5deea6b (/lib64/libclang-cpp.so.19.1+0x3b01a6b)
#9 0x00007fbdc5e32045 clang::format::TokenAnalyzer::process(bool) (/lib64/libclang-cpp.so.19.1+0x3b45045)
#10 0x00007fbdc5dead43 (/lib64/libclang-cpp.so.19.1+0x3afdd43)
#11 0x00007fbdc5deadbb (/lib64/libclang-cpp.so.19.1+0x3afddbb)
#12 0x00007fbdc5df0495 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*) (/lib64/libclang-cpp.so.19.1+0x3b03495)
#13 0x00007fbdc5df1fda clang::format::reformat(clang::format::FormatStyle const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>, llvm::StringRef, clang::format::FormattingAttemptStatus*) (/lib64/libclang-cpp.so.19.1+0x3b04fda)
#14 0x000055fe06240425 (/usr/bin/clang-format+0x13425)
#15 0x000055fe06238958 (/usr/bin/clang-format+0xb958)
#16 0x00007fbdb9f2c7e5 __libc_start_main (/lib64/libc.so.6+0x3a7e5)
#17 0x000055fe0623998e (/usr/bin/clang-format+0xc98e)
Segmentation fault (core dumped)
```
```
$ cat file.h
#define {{parameter_a}}_C_{{parameter_b|upper}} {{some_parameter_values + some_index}}
```
Another example file trying to isolate the issue further - the seg fault seems to trigger when the line exceeds a certain length:
```
$ cat another-crash-example.h
#define {{some_very_long_long_long_parameter_name_xxxxxxxxxxxxxxxxxxxxxxxxxxxx_over_by_1}}
#define {{some_very_long_long_long_parameter_name_xxxxxxxxxxxxxxxxxxxxxxxxxx_this_is_ok}}
```
This file will cause the same seg-fault, but if commenting the first line it works just fine:
```
$ cat no-crash-example.h
// #define {{some_very_long_long_long_parameter_name_xxxxxxxxxxxxxxxxxxxxxxxxxxxx_over_by_1}}
#define {{some_very_long_long_long_parameter_name_xxxxxxxxxxxxxxxxxxxxxxxxxx_this_is_ok}}
```
![]()
_______________________________________________
llvm-bugs mailing list
[email protected]
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
