https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96380
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org Keywords| |accepts-invalid --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- extern const int a, b; enum struct c; template <class> enum struct c : union enum struct c { e = b, f = a }; enum class c {}; ICEs even without -fpermissive. And extern const int a, b; enum struct c; template <class> enum struct c : union enum struct c { e = b, f = a }; is accepted for some reason, even when for e.g. template <class> enum E : int { F }; we reject it: error: template declaration of ‘enum E’ Marek, have you made any progress on this?