[Bug libstdc++/101056] std::compare_partial_order_fallback missing the constraint of "F < E is well-formed"

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101056

--- Comment #1 from 康桓瑋 <hewillk at gmail dot com> ---
This is not a bug, it's just that LWG3465 has not been implemented yet.