https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67491 Bug 67491 depends on bug 104615, which changed state.
Bug 104615 Summary: [Concepts] ICE in explicit instantiation when multiple candidates are valid (CWG2421) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104615 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE