https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112709
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- The .ASAN_CHECK call before the returns_twice fn call was added in r6-6758-g7db337c247a6f34708b502016d58c2ef9991b2a8 and with .UBSAN_NULL call before it with -fsanitize=undefined since r0-126632-gb9a55b135e5482e2484c27b6233ebf9132347ee5 when -fsanitize=null support has been introduced.
