https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87208
--- Comment #2 from SztfG at yandex dot ru --- (In reply to Jonathan Wakely from comment #1) > Dup of PR 51577 ? Strictly speaking, it is not a dup, because PR 51577 and all the bugs marked as dups of PR 51577 are about finding an operator with namespaced parameters in the global namespace, but here the situation is the reverse. But the bugs could be closely related.
