https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65773
Jan Hubicka <hubicka at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu.org --- Comment #4 from Jan Hubicka <hubicka at gcc dot gnu.org> --- Loading NULL as THIS pointer seems fishy indeed. One case I can think of is ICF merging the method with something else and redirect the call to something else where parameter 0 has different meaning. Can you try -fno-icf?