https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79956
--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> --- I can also see profiledbootstrap failure in: .././../gcc/simplify-rtx.c:6021:12: error: ‘result_s’ may be used uninitialized in this function [-Werror=maybe-uninitialized] return result_s; ^~~~~~~~ It worked with a revision from 3.3.2017, is it the same issue as seen by Markus?