[Bug c/123494] [13/14/15/16 Regression] ICE Segmentation fault in groktypename when using _Alignas within a cast expression with int

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123494

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[13/14/15/16 Regression]    |[13/14/15/16 Regression]
                   |ICE Segmentation fault in   |ICE Segmentation fault in
                   |groktypename when using     |groktypename when using
                   |_Alignas within a cast      |_Alignas within a cast
                   |expression with _BitInt     |expression with int

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Shorter testcase without _BitInt:
```
int main() {
    return (_Alignas(long double) int (int));
}
```