[Bug debug/66068] [6 Regression] error: type variant has different TYPE_VFIELD

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66068

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Another testcase:

union U a;
const union U b;
union U
{
};