[Bug libstdc++/105844] [10/11/12/13 Regression] std::lcm(50000, 49999) is UB but accepted in a constexpr due to cast to unsigned

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105844

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> I think the fix we want is simply:

I meant to say the fix we want for __absu. We still need to detect overflow
separately.