https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 79982, which changed state.
Bug 79982 Summary: Compiler crashes when using illegal concepts (nested requirements) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79982 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |FIXED