[Bug libstdc++/108118] std::weak_ptr lacks a self-usurp check on move

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108118

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Basically you have:
w = std::move(w);

I think that is just undefined code at this point ... But I am not 100% sure.