[Bug c++/86577] non-ADL name lookup for operator<< at instantiation time?

[leni536 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86577

--- Comment #3 from Lénárd Szolnoki <leni536 at gmail dot com> ---
(In reply to Jonathan Wakely from comment #2)
> Is this a dup of PR 51577 ?

Yes, seems like it is.