https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79061
--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> --- (In reply to Richard Biener from comment #2) > Is this after the fix for PR79042? I am nearly certain that it was after that fix. Before, I got an UBSAN overflow but only when combining OpenMP, LTO, -fipa-cp-clone and UBSAN, which I had hoped PR78365 and PR78599 would fix. (It didn't.) Shortly after, I saw the commit for PR79042, tried whether it made a difference - and ended up with this bug. [Sorry for not narrowing the regression range in the initial report. (I somehow failed to realize that this ASAN message comes way before the UBSAN error can be triggered.)]