https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120417
--- Comment #7 from Simon Sobisch <simonsobisch at gnu dot org> --- UB may be necessary to trigger that (and with GCC+libc that _does_ work on all environments but GNU/Linux 32bit [in theory it could also be multiarch -m32, but I think that should not make a difference]) :-/
