https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84360
--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to David Malcolm from comment #3)
> So should this ideally read:
> return type ‘T’ {aka ‘class std::tuple<int, int, int>’} is incomplete
> to express both the name the code used, and the underlying type?
Yes.
