@@ -2776,10 +2776,18 @@ } // revisit_mdo_stack is cleared in reset() follow_stack(cm); } } +#else +void PSParallelCompact::revisit_mdo(ParCompactionManager* cm, DataLayout* p) { + ShouldNotCallThis(); +} + +void PSParallelCompact::follow_mdo_weak_refs() { + ShouldNotCallThis(); +} #endif // ( COMPILER1 || COMPILER2 ) #ifdef VALIDATE_MARK_SWEEP