<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/64501>64501</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Assertion failed: (VDecl->isLinkageValid()), function DeduceVariableDeclarationType, file /usr/ports/devel/llvm-devel/work-default/llvm-project-2f8d8c78a89ea86c602db38ee63f48f5a8229b36/clang/lib/Sema/SemaDecl.cpp, line 12821.
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

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

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

<pre>
    FreeBSD 13.2-RELEASE
All supported architectures seem to be affected.
llvm-devel 18.0.d20230802 package

```
namespace details {
        auto _possibleCompare = [] {};
}
```

Compile with:
`clang++-devel -cc1 -triple i386-unknown-freebsd14.0 -emit-obj Canon-cb328f.cpp`

Output:
```
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0. Program arguments: /usr/local/llvm-devel/bin/clang++ -cc1 -triple i386-unknown-freebsd14.0 -emit-obj Canon-cb328f.cpp
1. Canon-cb328f.cpp:2:31: current parser token ';'
2. Canon-cb328f.cpp:1:1: parsing namespace 'details'
#0 0x0000000819106220 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/usr/local/llvm-devel/lib/libLLVM-18git.so+0x4312220)
#1 0x0000000819106950 (/usr/local/llvm-devel/lib/libLLVM-18git.so+0x4312950)
#2 0x00000008191037bc llvm::sys::RunSignalHandlers() (/usr/local/llvm-devel/lib/libLLVM-18git.so+0x430f7bc)
#3 0x0000000819106c30 (/usr/local/llvm-devel/lib/libLLVM-18git.so+0x4312c30)
#4 0x00000008100f6188 handle_signal /usr/src/lib/libthr/thread/thr_sig.c:303:3
Abort (core dumped)
```

</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJykVU2PozgQ_TXOxQIZOwHnkEPS6WgPvdrR9Kivo8IuEk-MQf6Ynvn3KwPbyfSO9rCNiCGY53pVr3iGEMzZIe7I5kA2xxWkeBn8brymFr6t2kH_3J084uH5SCtR8uLz49Pj_vmRsCNh-721NKRxHHxETcGri4moYvIYaEDsaRxoixS6DlVEXc4oa7_3hcbvaGklS1ZqzrhgknE6grrCGefXlrFmyzn9ddBjGEEh1RjB2EBJc5in6HJAigP9Og4hmNbiw9CP4JEScaRzihOiORKx4PL970LNY8Ybi_TVxAsRN1LKgjsTfiD8sORSKFXRInozWqRGyLpI7uqGV1d0HrENulqXjBbYm1gM7Tf6AG5whWoFl12pxvFd4L9SHFO8D3lP7tOkAg2p7U2kQNt0ph6zELnmlxjHkKH8RPjpbOIltaUaesJPufjLpRj98A1VJPxkQkgYCD9RcJoap2zSSOMFqfIQLrQFdY0eFBL-QEePox8UhoCahiH5-XFGQgiDMpC7wSdHg_JmjIvszxHUlerUj29JsZJ-8sPZQ0_Bn1OPLmbalPBTCj7THBTYf-hOZSb81BpH-OlOgI-XfmJTlf-eEHtOxF5UmZVK3qOLdAQf0NM4XNFRwpvcSbyZ1-C_XaNafhPUuDO9tTHhzdLJb2sQLhhlP9h8yGpbsZpzRifpxJ6IffgZ5ptP3rg4FfbLrI68veTh9esQokfoCa-zQsZFwreUcPnfBbamncenp5c_i0qeTSzDQPiB_ViLinPOCN--ca3ec91u2IdjbDe_xODvYoimVb-rx-fkns3Zgf0DnLbow8TjoymzrmnVPR3xPmUlPp6yEr-kvL6PwVhXV1LSy5TW1zDlePtMglf368dLfhgvHkHPNxlRqtzJTORxse82-wXhUg0epy8T9Y3Cr4az0juht2ILK9xV9bZa80o2bHXZ1XUtUUpQqDvQAJ1s243eNN2mVqrhcmV2i7831YavBSs3641o1tCJbrvmTHZkzbAHY8tcrXLw59VkR7t6vWHVykKLNkzbE-cOX-k0STjPu5XfTRVu0zmQNbMmxHBbJZpocbcPAX00g6MdGIt69hf5ckRlCyIeTXgyLu86L2CNnvtlOh9ol5yakEfUSeELeAOtxYwED3nmy89x8r4ubxFvcmQbzmb6Jvx9F7wO_lpo7CDZ-M6IC95JLVUjQW4RZK1qxnUrJGIturXsNiA537aivtnfIvoz9rBcMrvJdvgDtcYhrbjkVblK3u7-_74wafF3AAAA___c6HV9">