https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106101
--- Comment #29 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Florian Weimer from comment #28)
> (In reply to Richard Biener from comment #1)
> > Created attachment 53207 [details]
> > reduced testcase
>
> Do you happen to have the unreduced test case still?
>
> int *yyvsp = 0;
>
> followed by:
>
> if (strncmp( yyvsp[0], "~", 1) == 0) {
>
> and
>
> free(yyvsp[0]);
>
> looks rather bogus.
You can make `yyvsp` and argument if you are worried about the null pointer and
you still get the crash back in 12.1.0.
That is:
```
int yyparse (int *yyvsp)
{
int yystate = 0;
```
See https://godbolt.org/z/9YMsar1Ej .
