https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86376
--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> --- My UBSAN bootstrap is broken by a recent commit: https://gcc.gnu.org/ml/gcc-patches/2018-07/msg00111.html I'll try a bit older revision to see if I see also the debug info comparison failure.