https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 85808, which changed state.
Bug 85808 Summary: [concepts] unqualified name lookup breaks after qualified lookup in nested requirement https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85808 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED