https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79078
--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Daniel Krügler from comment #9)
> PR 61754 seems to be related.
I think for the examples here it makes no difference if you use
__attribute__((deprecated(""))) or [[deprecated("")]]
