[Bug c++/107889] Incorrect parsing of qualified friend function returning decltype(auto)

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107889

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I think this is https://wg21.link/cwg1828 which was resolved by
https://wg21.link/p1787 which GCC does not implement yet.