[Bug c++/99546] Weird return value of C++20 requires expression

[hewillk at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99546

--- Comment #1 from 康桓瑋 <hewillk at gmail dot com> ---
You can see more weird cases in this: 
https://stackoverflow.com/questions/66578966/weird-return-value-of-c20-requires-expression.