[Bug libstdc++/104019] Testsuite 17_intro/headers/c++2020/stdc++_multiple_inclusion.cc failures

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104019

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> The aliasing violation is real, we should use memset instead.

Patch: https://gcc.gnu.org/pipermail/gcc-patches/2022-January/589024.html