https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 90287, which changed state.
Bug 90287 Summary: [concepts] bogus error on overload failure inside requires-expression https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90287 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE