https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106842
Richard Biener <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[12 Regression] misleading |[12/13 Regression] |warning : iteration X |misleading warning : |invokes undefined behavior |iteration X invokes | |undefined behavior --- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> --- And for sure the cited rev. doesn't fix anything, in fact it should not have caused less threading.