<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/127421>127421</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Clang: Failed assertion in nested instantiation
        </td>
    </tr>

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

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

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

<pre>
    While investigating a separate crash in a clang fork, I came across this gnarly nested instantiation that ICE's when assertions are enabled.

https://godbolt.org/z/317rj76cK

I wish I could say that I could reproduce this with fewer than three layers of nested templates - alas, nay.
</pre>
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