http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59265
--- Comment #21 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- (In reply to Jan Hubicka from comment #20) > Hmm, it may be someone altering the insns during streaming process. You may > try to check > who is doing that while streaming out the relevant .o file. > Is it compilation->linker streaming or wpa->ltrans? It is wpa->ltrans: *** [/tmp/ccgCD7yp.ltrans19.ltrans.o] Error 1 > UIDs are initialized in renumber_gimple_stmt_uids calls in passes.c and then > you can > try to check if someone touch the statements.... > > I will try to check if I spot something obvoius, but probably only tomorrow. I've tried to bisect the issue, but it's messy. However I think I can rule out any commit since r205447. If r205447 is the culprit I cannot say for sure, because Firefox ICEs during the build.