[Bug c/121506] [15/16 Regression] ICE in c_type_tag with va_list

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121506

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note this happens on targets where va_list is an array to a struct, e.g.
x86_64.