<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/124629>124629</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Crash report for clang-format
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-format
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          Bronek
      </td>
    </tr>
</table>

<pre>
    Hi, while working on my project I experienced clang-format crash.

The source file which caused the crash is here https://github.com/Bronek/functional/blob/crasher_clang_format/tests/pfn/expected.cpp (it does not compile cleanly, clang-format crashed while I was typing the unfinished last line)

More details:

```
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /usr/bin/clang-format -output-replacements-xml -style=file -fallback-style=LLVM -assume-filename=/home/LAN/bronek/gits/functional/tests/pfn/expected.cpp -offset=5845 -length=10
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  libLLVM.so.19.1 0x00007f8c751a93c6 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 54
1  libLLVM.so.19.1      0x00007f8c751a7070 llvm::sys::RunSignalHandlers() + 80
2  libLLVM.so.19.1      0x00007f8c751a9a8b
3  libc.so.6 0x00007f8c73dd1050
4  libclang-cpp.so.19.1 0x00007f8c7f36eb08 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) + 1304
5 libclang-cpp.so.19.1 0x00007f8c7f3703f8 clang::format::LeftRightQualifierAlignmentFixer::fixQualifierAlignment(llvm::SmallVectorImpl<clang::format::AnnotatedLine*>&, clang::format::FormatTokenLexer&, clang::tooling::Replacements&) + 296
6 libclang-cpp.so.19.1 0x00007f8c7f370200 clang::format::LeftRightQualifierAlignmentFixer::analyze(clang::format::TokenAnnotator&, llvm::SmallVectorImpl<clang::format::AnnotatedLine*>&, clang::format::FormatTokenLexer&) + 112
7  libclang-cpp.so.19.1 0x00007f8c7f3794c9 clang::format::TokenAnalyzer::process(bool) + 1161
8 libclang-cpp.so.19.1 0x00007f8c7f370c3d
9  libclang-cpp.so.19.1 0x00007f8c7f340f25 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*) + 4165
10 libclang-cpp.so.19.1 0x00007f8c7f341da1 clang::format::reformat(clang::format::FormatStyle const&, llvm::StringRef, llvm::ArrayRef<clang::tooling::Range>, llvm::StringRef, clang::format::FormattingAttemptStatus*) + 81
11 clang-format 0x000055f2aef3dfb1
12 clang-format         0x000055f2aef3b5dd
13 libc.so.6 0x00007f8c73dbc24a
14 libc.so.6            0x00007f8c73dbc305 __libc_start_main + 133
15 clang-format         0x000055f2aef38471
```

I originally experienced it with clang-format 19.1.7, installed from [apt.llvm.org](https://apt.llvm.org/bookworm/), details from the devcontainer:

```
root@a3d12c39e031 ~ # clang-format --version
Debian clang-format version 19.1.7 (++20250114103228+cd708029e0b2-1~exp1~20250114103334.78)
root@a3d12c39e031 ~ # sha256sum /usr/lib/llvm-19/bin/clang-format
2767d049a57a6b4cc20ec076de58b02928a2d75f5908e29716206b3f12aade6e /usr/lib/llvm-19/bin/clang-format
root@a3d12c39e031 ~ # dpkg -S /usr/lib/llvm-19/bin/clang-format
clang-format-19: /usr/lib/llvm-19/bin/clang-format
root@a3d12c39e031 ~ # dpkg -s clang-format-19
Package: clang-format-19
Status: install ok installed
Priority: optional
Section: devel
Installed-Size: 240
Maintainer: LLVM Packaging Team <pkg-llvm-team@lists.alioth.debian.org>
Architecture: amd64
Source: llvm-toolchain-19
Version: 1:19.1.7~++20250114103228+cd708029e0b2-1~exp1~20250114103334.78
Depends: libc6 (>= 2.34), libclang-cpp19 (>= 1:19.1.7~++20250114103228+cd708029e0b2), libgcc-s1 (>= 3.0), libllvm19 (= 1:19.1.7~++20250114103228+cd708029e0b2-1~exp1~20250114103334.78), libstdc++6 (>= 11), python3
```

I also reproduced it with clang-format 18.1.8 installed from [clang-format-wheel](https://github.com/ssciwr/clang-format-wheel) for `pre-commit`

```
bronek@gdansk ~/gits/functional (git)-[crasher_clang_format] % clang-format -i tests/pfn/expected.cpp
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.      Program arguments: /home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format -i tests/pfn/expected.cpp
 #0 0x0000000000476af8 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x476af8)
 #1 0x00000000004748cc (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4748cc)
 #2 0x00007f343a4c41d0 (/usr/lib/libc.so.6+0x3d1d0)
 #3 0x0000000000405cb0 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x405cb0)
 #4 0x00000000004d6843 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4d6843)
 #5 0x00000000004d6928 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4d6928)
 #6 0x00000000004ead73 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4ead73)
 #7 0x00000000004d8907 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4d8907)
 #8 0x00000000004d893d (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4d893d)
 #9 0x00000000004b6d7b (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4b6d7b)
#10 0x00000000004b8b47 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x4b8b47)
#11 0x000000000042503a (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x42503a)
#12 0x0000000000409905 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x409905)
#13 0x00007f343a4ace08 __libc_start_call_main /usr/src/debug/glibc/glibc/csu/../sysdeps/nptl/libc_start_call_main.h:74:3
#14 0x00007f343a4acecc call_init /usr/src/debug/glibc/glibc/csu/../csu/libc-start.c:128:20
#15 0x00007f343a4acecc __libc_start_main /usr/src/debug/glibc/glibc/csu/../csu/libc-start.c:347:5
#16 0x000000000041c787 (/home/LAN/bronek/.venv/lib/python3.13/site-packages/clang_format/data/bin/clang-format+0x41c787)
bronek@gdansk ~/gits/functional (git)-[crasher_clang_format] % clang-format --version 
clang-format version 18.1.8
bronek@gdansk ~/gits/functional (git)-[crasher_clang_format] % sha256sum `which clang-format`
002151abe3f506a5c97dad005df0e4608d12b39216ed320dee192af61c42a364 /home/LAN/bronek/.venv/bin/clang-format
```

</pre>
<img width="1" height="1" alt="" src="http://email.email.llvm.org/o/eJzUWl1v2zjW_jXMDWGDH_q8yIXS1Jhi0vftNsUAuzcBRVI2NxIpkFQSz0V_-4KUHFuu3Ulnuutdo0Bk8ug8z_ngIQ9d5pxaaymvQXoD0tsrNviNsdc31mj5eFUbsb3-RQHyDj5vVCvhs7GPSq-h0bDbwt6af0ru4QcoX3ppldRcCshbpteLxtiOecgtc5slQBVA1ZeNhM4MlkvYRGUbxTeQs8FJAf1GjsJQObiRVsKN970DtAJkBchqrfxmqJfcdICsRnqArJpBc6-MZi0gq7o1NSCrqEXah8jjYeQByMpL5x0gq77RgKwCYe6lWPK-h4AUykNhpIPaeMhN1wd-vJVMt9tg_bc2STG55AN8Zg76bR_8EqwYdKO0ihItcx62SktAytEHH42VUEjPVBtti4MgQ9M_VH26e1_dv4duqDvlIYP1sIZW9sZ66M33fNK2T7s_iykwgKyUc4MMZkOmBVSat4OQB86uGX_0lnEZYnTvGX-EYuj6kRpaAlR-smZtWQeZXQ-d1D7AQ0BWg7PB5yp4c-aehRl8P_iFlX3LuIzvLF66Fi6c37YS0NsY_UXD2jbAvw7f3f32ES6Yc0MnF0FGsy6MA7LamE4Csrqr_i9g7qK_VjGisyT4TpgXpmmc9IDepkWSwkUr9dpvAL3FaGY8fFZ-YwYP3barTQsDDReSRGo3WAm3ZoAb9iRh9PUopH6XFiod5iz8VH35BRoLnfTR1VI_KWt08AR8YhaCDAVbH-7__vHm_-8-_OP954fwCshQiHFvlI7BVj6kzRgJCFtVh5eWzixxucQQvSCEUN4UPE8xKynPIp8gTyu3dePDJ6u0j6Z9CVEGpNgLWfb8YJy3knWAZCHNlQ6QEJAbmCYAVfhb2PiZY-coR6ewPw_6Xq01a39hWrTSOkCKnfoiuJy8SX3JihqgikZhHiSzQwkqBEZpUJeMEjEXed-f8lRDM1mjYlzPI8upQMTnO9n4z2q98X8bWKsaJW3VqnUM3Eq9SDtKMc3a7e8yCgJSHOi6j9XtI9NsLS3kRjs_efYMYCWEGlP3V7l9Nla4c295Y1q1-_L5YGl9H2AVn7-YR6l3mqsg7rwYBR4e-MsLxuOXmjnFH5y3Eekd3zA7Ew4DD96ysO6mafp-JsHa1nDmjT2Yp-_PG_U4PkSCvyotdvmBKQoJmL4hojmizV-MaKNevp2frZX7jrXtb5J7Yz90fRusOxNRrY1nXoq7WPar6KA3RuhOBkY_GPrRX6TMAKqyN7mLIPRTFsA89w_VRGsmT5idRRdz5pRRmABU5W-pEXmZ8PIcxGRb9MDkj94aLl0ob7Ux7R4wwwBVxZtiwqkAqCrfwi5BDUnPsVPaSxt2wrHCy93x51ykRofdhx14tkgPghWrwWfZzIcra9k2jM6CN09VptdyKhCDjudMMW4xf_z9DP53rfBKryvvZdeHHc8PLta6MRgJztKwoaG3OBgLhs9B_fe49Ge7qAjZivH8rDs6Jk0bwmRDRVNHITIX2n3mwnUqQk5jem7frjlJWJBIDiQOPkfCFKXw4SFIPjjPrH_omNLTZkGDmvQtrIokx0dHboCqD9BYtVaate121swoH0-Dc80hZZb5eGBynrWtFLCxpoMgvWG9X4bILI1dg_QWkGJ-Zp_Nk1VtzOOzsV2cLIPKqTkYFYbTo5BP3GjPlB7rzTctgzXGgwQxKjDhtJSIYvgVAkLnrBeLJ2mdMhqg6lbWiun5_DQ7WQfjYe0GkBuCSIowTjCiJI5xkaMCkVKimizwV_nS468HQpQmy7wYO57z1NyGkTRzQ7fvJVpV7xoYXJ7sLcKZMc9ygZKSpTnL6oRzgiRHeSZkWtSIlKRgRORpk5aokKTMcUZQVtMGE8aEzOQPwp03QPSPa7i4_0F9h1-D2GEv9VMIOXgMgapPjD-yUDeqE5NTHaDVLpmhedzndXjbKmOV3wYR00-NFqruZWy6wqiQTzIMfdi9tbhXv0c4koQE_cjUPn9hbPNGSqFl_iJZBwF91z-uF9F2H_qRBLXKebdkrTJ-sxQxX-Oaoe8BqirLN8pL7gcbcVgnsnBeHA_gYWRUZUzLN0zp0dTfpvynFQwH3jHRv_6lLA9LqZdaRAeG2pTFhRNOvbeQLGkyrerDXQeXBzI_RmSvbc35wuEDRXSJ9rPB-h3Mj2J8d0mP6p0XfNR0aC7Gk0S_9Ruj6akyy1pnoJW9NWI4X1-LJV4WJ4rrLHufN1K2p0rs7FrEOa6e7dE6mt4lJWxMbMd7KxfcdJ3yr1wPqU83DglaC6bdI_x66vIheGIde_ZFoHrqFiq9hYAcbVMLBc_fWfwvXQidvqNZPkn99FrcpsxYYhpCo7xc9GNtcrsI7S_sBPPszA3TH7gslEM07fvjJ8kz1hTjnvafIwrIDXoZocftMBDDR8SSgvMLEQvQe2Lk9cBFE8oSnmCBJmKz_Wl3VItKqMAC7XXQuXEo5TW6jHERek8smRMTWZHQyxCL0Hti6TGxklwoTyP0nlg2JyaZyC_ksQi9J5YfeawoUX4hjwXoPbHiG2JUXIwYFXti5ZxYnYm8vgyxCD39GEIoPirSdVEnFwplhN4TOyrSJEWUXYZYhN4TI0cFtixReqECG6D3xOh892BcomLernPWtruefdpRnOUBSNZD6IXXQfjgL3dDMGAZBLdOyD6Q1L1vp13oWO9yA2iVJ4BWdCKVfEOKcxjllVb-T_AYH8P4IoIveThahxNwRdAEmp4CPXVx8VPAaZIDWqUT9lHRxjwvLrSgIvSYHv_W0_PuUgMeNdf764zYTPx8GgcXGBmafso-9EJsHBAiOMWslrRJUcZSXuaCCYRS0SCZZKgQmNS0JDiTghIkpMQlYU2GeUIYzZI_PlefvCQ47F2uxDUVJS3ZlbzGOS0QpmmaXG2um6SgjWRZQeqyxjllROAEy5yWNGsYKq7U9dgCkpxgSihdJgnPsyxtGkoxa4oGJEh2TLWvF1pXsbu4xiTJSHnVslq2Lv7PAkLmGUJAentlr2NvUg9r99rvv2ryyrfy-l3sSaZ2J_Rqh2quBtte__kGaGL5dE3-FQAA__-0LCmv">