<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/85148>85148</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang 18+ frontend crash on including a header file
        </td>
    </tr>

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

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

    <tr>
      <th>Reporter</th>
      <td>
          Sid911
      </td>
    </tr>
</table>

<pre>
    This issue is related to https://github.com/tcbrindle/flux/issues/174.
Initially tested on : 
```
Ubuntu clang version 19.0.0 (++20240222031214+307409a8872f-1~exp1~20240222151237.1514)
Target: x86_64-pc-linux-gnu
Thread model: posix
```
Clang 19 backtrace can be accessed [here](https://gist.github.com/Sid911/a76b694a6c69656a5fb9957a2dec2551#file-flux_clang19_stacktrace-txt) with compiler explorer link to reproduce on clang 18 [here](https://flux.godbolt.org/z/8e87j7oM6) 

The flux maintainer did patch a workaround in the related PR to the issue by bypassing using the iterator altogether and using internal `FLUX_FOR` macro but I doubt this compiler behavior is acceptable. I also have experienced this before in last 3 weeks while including some other header library unfortunately my memory is vague about what I was doing so I won't be able to reproduce it. 
</pre>
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