https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68791
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- (In reply to jenda.plhak from comment #2) > Yes. That was the first thing I did. However we use Tup, but I don't really > think it is relevant.(In reply to Markus Trippelsdorf from comment #1) > > Have you rebuild all the object files with 5.3? If not run "make clean" > > and try again. > > Yes. That was the first thing I did. However we use Tup, but I don't really > think it is relevant. Ok. Then please try to reduce the issue further. Remove as many object files from the final link as possible. For the remaining ones generate preprocessed files for each one of them and attach them here (plus the full compiler command line). (If you want to automate the reduction, please read: https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction#Reducing_LTO_bugs)