https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 92804, which changed state.
Bug 92804 Summary: [10 Regression] ICE trying to use concept as a nested-name-specifier https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92804 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED