[Bug c++/78925] Inline friend template function not hidden during ADL

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78925

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is the same problem as described in PR 54376 and we decided GCC, EDG, and
MSVC were right to reject the code.