https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78810
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Markus Trippelsdorf from comment #4) > They invoke undefined behavior by using misaligned accesses, see: > https://bugs.ruby-lang.org/issues/11831 > > It was fixed once, but they dropped the fix in the current versions. Great, let's wait for another fix ;)