[Bug c++/106889] __builtin_strlen fails for some constexpr constructs

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106889

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #2)
> I think std::strlen isn't constexpr even in latest C++, so all of this is
> permitted by the standard...

Right, which is why I recommend using char_traits::length instead.