https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 67658, which changed state.
Bug 67658 Summary: [concepts] invalid code with constrained concepts compiles https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67658 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED