https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113271
--- Comment #3 from Yi <652023330028 at smail dot nju.edu.cn> --- (In reply to Xi Ruoyao from comment #2) > -fsanitize=undefined is even explicitly mentioned in the bug report > guideline at https://gcc.gnu.org/bugs/. And the red banner in the new bug > page also mentions -fwrapv. I'm sorry about this issue. I knew what you mentioned. I seemed a little out of my mind when I brought up the issue. (In reply to Jakub Jelinek from comment #1) > This is UB, as can be seen if you compile with -fsanitize=undefined: I'm sorry again.