https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 67210, which changed state.
Bug 67210 Summary: [concepts] Error parsing ">>" after a template-id that names a concept https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67210 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |FIXED