--- old/src/hotspot/share/gc/shared/memAllocator.cpp	2019-07-17 11:42:53.949311141 -0400
+++ new/src/hotspot/share/gc/shared/memAllocator.cpp	2019-07-17 11:42:53.729311149 -0400
@@ -370,6 +370,9 @@
     HeapWord* mem = mem_allocate(allocation);
     if (mem != NULL) {
       obj = initialize(mem);
+    } else {
+      // Keep the unhandled oop detector happy.
+      obj = NULL;
     }
   }
   return obj;