<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/99725>99725</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            `-Wvla-cxx-extension` does not produce an error with `-Wall -pedantic-errors`
        </td>
    </tr>

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

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

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

<pre>
    Testcase:
```c++
int f();
void g() {
  int arr[f()];
}
```
Compiling this invalid code in C++ mode with `-Wall -pedantic-errors` should give an error. But it doesn't, it just produces a warning.

It seems that the fact that `-Wvla-cxx-extension` is in `-Wall` is breaking `-pedantic-errors`. Replacing `-pedantic-errors` with `-Werror=pedantic` works properly, which is odd since `-pedantic-errors` is supposed to imply `-Werror=pedantic`.

(Including this warning in `-Wall` seems like a strange choice; it's not in GCC's `-Wall` and doesn't seem like the kind of thing that `-Wall` usually warns about.)
</pre>
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