https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114912
--- Comment #1 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- Since this happens while building libgcc during stage1, perhaps this can be reproduced with a cross? Would it be possible to get the preprocessed file that's failing? You could try /var/gcc/reghunt/sigbus-range/288807/./gcc/xgcc -save-temps [blah blah], and attach the libgcc2.i file that gets generated.
