[Bug tree-optimization/104475] [12/13 Regression] Wstringop-overflow + atomics incorrect warning on dynamic object

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104475

--- Comment #25 from Jason Merrill <jason at gcc dot gnu.org> ---
This was clarified for C++ last year by http://wg21.link/cwg2535

I notice that C warn_for_null_address also warns about &p->mem; I don't know
where that is justified in the C standard.