[Bug libstdc++/70692] No warning when std::function binds a reference to a temporary

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70692

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
"A type trait to detect reference binding to temporary"
https://wg21.link/p2255r2 is the current direction to resolve this.