[Bug libstdc++/100249] missing forwarding std::__invoke result in ranges::is_permutation and ranges::clamp

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100249

--- Comment #1 from 康桓瑋 <hewillk at gmail dot com> ---
(In reply to 康桓瑋 from comment #0)

> when the type of __proj_val is an rvalue reference, we need to convert it to
> rvalue for the next std::__invoke call: https://godbolt.org/z/1G7aqxs3c.

More simple case: https://godbolt.org/z/Y11c71cq6