https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86368
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Justin Bassett from comment #7) > and it won't extend to future standardized attributes. That's a Good Thing. If I use a new standardized attribute like [[no_unique_address]] I definitely want to know if the compiler doesn't recognize it, because that affects the ABI of my code.