[Bug c++/60860] Friend function declaration incorrectly hides function in outer namespace

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60860

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
It seems to have been fixed before the r235368 commit that fixed bug 70522, I'm
trying to find the right commit.