https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 79591, which changed state.
Bug 79591 Summary: [concepts] failure to distinguish overloads from different namespaces with differing constraints https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79591 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED