https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99920
--- Comment #11 from seurer at gcc dot gnu.org --- Swapping out those two .o files (individually and together) didn't yield a successful build. I brought in the 8.4.0 .o files in one at a time and eventually I got a successful build but at that point it had brought in most of them. I am now trying each .o swapped in individually.