--- old/src/hotspot/share/gc/z/zCollectedHeap.cpp	2019-02-13 16:34:51.978271718 +0100
+++ new/src/hotspot/share/gc/z/zCollectedHeap.cpp	2019-02-13 16:34:51.582271732 +0100
@@ -118,10 +118,6 @@
   return is_in(p);
 }
 
-void ZCollectedHeap::fill_with_dummy_object(HeapWord* start, HeapWord* end, bool zap) {
-  // Does nothing, not a parsable heap
-}
-
 HeapWord* ZCollectedHeap::allocate_new_tlab(size_t min_size, size_t requested_size, size_t* actual_size) {
   const size_t size_in_bytes = ZUtils::words_to_bytes(align_object_size(requested_size));
   const uintptr_t addr = _heap.alloc_tlab(size_in_bytes);