https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 89301, which changed state.
Bug 89301 Summary: [concepts] requires clause on a template alias is ignored https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89301 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE
