<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/56128>56128</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang lexer crashes
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            crash-on-invalid
      </td>
    </tr>

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

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

<pre>
    clang lexer crashes ([details](https://godbolt.org/z/8vnY6Ke39)):

```
\Ud{4}
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJxtUMtuwyAQ_Bq4RLHwGvw4cGga9dJzDz3ysk1LTAQ4avv13biNKkWVZmGHXbGzo6P9lCaoZdoF9-HSziSVZ5d3BHoiDtYV5UMm4oh8LuWcSfNA4AkxRatjKFVME7IvjP6yvLbPrhkIbMBOdiTsdrbsFz9UPL5Y0h046Y53DdTKxg7NoGjxJbj_5NE1BXmnx5d51ZWJJyQhXG7X_pzimzMFqc95dRkT0dbQ01nWlo2j6rRRnDMFzEDdMcGhU8PAxnqgQWkXskQnCMA2ex-XvV8uKniLT2gM9RIYAGuB1Zy1QlSDa5U2vR41r_sODOHMndDG6irn6hdNclOm1yljMfhc8l9R5eynxbltKv6v1jLHJOf47vxCtx3ktsA3SHKGRA">