[Bug c++/126009] memset erroneously indicating "region of size 0" instead of reporting possibly-null pointer

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126009

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
with -fdiagnostics-show-context, it does show it.