https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 92103, which changed state.
Bug 92103 Summary: constraints not checked on nested class template https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92103 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED