[Bug c++/103084] Accepts invalid using enum declaration with an invalid elaborated-type-specifier

[terra at gnome dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103084

--- Comment #7 from M Welinder <terra at gnome dot org> ---
Maybe kick it up to the C++ people?

Note, that if the code is not allowed then a type alias is no longer as
powerful as the original type.  I really doubt that was intended.