https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95935
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Doesn't have to be scoped enum: template<typename = enum E { }> struct X { };
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95935
--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> --- Doesn't have to be scoped enum: template<typename = enum E { }> struct X { };