[Bug c++/95349] Using std::launder(p) produces unexpected behavior where (p) produces expected behavior

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95349

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't know the answer, and I don't know why it's useful to try this anyway.