https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 92894, which changed state.
Bug 92894 Summary: "declared using local type 'test01()::X', is used but never defined" during concept satisfaction https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92894 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED
