[Bug c++/124181] constexpr function with null statement throws compile error in C++11, but should be ok by specification

[giovanni.gaio at proton dot me via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124181

--- Comment #1 from Giovanni Gaio <giovanni.gaio at proton dot me> ---
I also tested the issue with different versions, and the bug is also present in
versions: 14.3.0, 13.4.0, 12.5.0, 11.5.0
That is all versions I tried