[Bug c++/83469] union is not accepted as a valid class-key in template name resolution

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83469

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Created attachment 51938
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51938&action=edit
untested fix

This is the patch which fixes this one and PR 98417. I had originally was going
to do it was 2 seperate patches but we might introduce a regression so I
combined the two.