[Bug libstdc++/121745] The return of get(pair<_Up, _Tp>&& __p) may be ill-formed

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121745

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Oops the ones that take const pair<T,U>&& need to use forward<const T>