[Bug c++/120460] std::function ignores [[nodiscard]] attribute

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120460

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is now https://cplusplus.github.io/LWG/issue4268