<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/139894>139894</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            [OpenACC] UNREACHABLE executed at /root/llvm-project/llvm/tools/clang/lib/Sema/SemaOpenACCClause.cpp:2041!
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          k-arrows
      </td>
    </tr>
</table>

<pre>
    Reproducer:
https://godbolt.org/z/fqMWx1Mdz
```cpp
#pragma acc foo gang(2)
```
</pre>
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