[Bug c/107980] va_start does not warn about an arbitrary number of arguments in C2x mode

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107980

--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Aaron Ballman from comment #14)
> Also, it was a potentially silently breaking change (if you don't mind
> horribly contrived examples of breakage): https://godbolt.org/z/T4bG6179f

But __COUNTER__ is not part of the standard ....