https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 66460, which changed state.
Bug 66460 Summary: ICE using __func__ in constexpr function. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66460 What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |DUPLICATE