[Bug libstdc++/102984] strange alignment issues with std::vector::emplace/push_back and overaligned type

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102984

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #1)
> I think this is a user error, I don't think the standard allocator
> guarantees such alignment, you'd need to use your own allocator for the
> container.

It has to work since C++17.