https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64727
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Can you reproduce it with stage1 cc1plus? As in, is it miscompiled compiler or just some problem on the testcase? If the former, can you bisect exactly to the version and bisect which *.o file it is?