[Bug libstdc++/103013] Underconstrained constructor span(_Range&&)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103013

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And libstdc++ has exactly the constraints required by the C++ draft. I suggest
reporting this as an LWG defect.