[Bug libstdc++/80504] missing qualification causes ADL to be used in std::ref / std::cref

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80504

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Huh, what I actually committed doesn't match the changelog. Oops.

But what I committed is better anyway.