https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105950
--- Comment #16 from John Kanapes <jkanapes at yahoo dot com> --- Good to know (O3). I have posted my -fsanitize=undefined. Doesn't compile with it, but I need help to fix that,because I don't know what it means:( On Tuesday, June 14, 2022 at 02:35:05 PM GMT+3, redi at gcc dot gnu.org <gcc-bugzi...@gcc.gnu.org> wrote: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105950 --- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> --- Just running in GDB doesn't find bugs (and there is no -O6 level, -O3 is the highest). Did you try it with -fsanitize=undefined yet?