<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/60344>60344</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang crash with `template <typename b> using c = b _Nullable;`
        </td>
    </tr>

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

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

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

<pre>
    ```
$ cat a.cpp
class a;
template <typename b> using c = b _Nullable;
c<a>;
$ bin/clang -cc1 a.cpp -fsyntax-only
crash ...
```
</pre>
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