[Bug c++/97778] return type not deduced with gcc but get deduced with clang

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97778

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like a dup of PR 64194, checking ...