[Bug c/125524] warning for __counted_by(len) field (or sanitizer) being changed not atomically

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125524

--- Comment #4 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Basically:
buf->ptr++;

Is ignored.