<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/54350>54350</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            clang-format crashes on invalid C++ code with requires
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            clang-format,
            crash
      </td>
    </tr>

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

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

<pre>
    clang-format crashes when formatting `clang/test/Parser/cxx2a-concepts-requires-expr.cpp`, which can be reduced to a single line (of _invalid_ C++ code) as shown below:
```
~$ ls .clang-format
ls: .clang-format: No such file or directory
~$ ./clang-format -version
clang-format version 15.0.0 (https://github.com/llvm/llvm-project 9f616a467fc710f084b7e57812a2ed64c214c2c6)
~$ ./clang-format
bool r10 = requires (struct new_struct { int x; } s) { requires true; };
Assertion failed: ((!TypeIsFinalized || T == Type) && "Please use overwriteFixedType to change a fixed type."), function setType, file FormatToken.h, line 351.
...
```
</pre>
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