https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113727
--- Comment #10 from David Binderman <dcb314 at hotmail dot com> --- (In reply to Sam James from comment #7) > Can you try produce a testcase without UB please? I have some partly reduced code that seems to have no UB. cvise $ ~/gcc/results/bin/gcc -w -fsanitize=address,undefined bug1002.c cvise $ ./a.out 1 > 0 cvise $ ~/gcc/results/bin/gcc -w -fsanitize=address,undefined -O1 bug1002.c cvise $ ./a.out 1 > 1 cvise $ diff 0 1 469c469 < ...checksum after hashing g_994.f3 : 5F99C263 --- > ...checksum after hashing g_994.f3 : 3D4A5D24 cvise $