[Bug c/121502] [15/16 Regresion] ICE after invalid use of va_start

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121502

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Keywords|error-recovery              |
   Last reconfirmed|                            |2025-08-11
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, here is a testcase which provides no error message before ICEing:
```
#include <stdarg.h>
  int arg;
  int r = va_start(arg, n);
```