https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004 Bug 55004 depends on bug 110828, which changed state.
Bug 110828 Summary: union constexpr dtor not constexpr when used in member array https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110828 What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |DUPLICATE