https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119012
--- Comment #16 from Sam James <sjames at gcc dot gnu.org> --- (In reply to Levi Zim from comment #15) As long as the flag is passed correctly and applied to both the stage2 + stage3 builds, then the flag can't be to blame (just a trigger for it, rather than some problem with the flag itself).