[Bug c++/89745] [[no_unique_address]] has no effect in some cases

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89745

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Right, this is how it's supposed to work. Two different objects of the same
type must have unique addresses.