https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65144 Bug 65144 depends on bug 65141, which changed state.
Bug 65141 Summary: ISO_10646 constant parameters convert kind when used with substring references https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65141 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE