--- old/src/hotspot/share/jfr/leakprofiler/checkpoint/eventEmitter.cpp	2020-01-14 13:46:53.721328463 -0800
+++ new/src/hotspot/share/jfr/leakprofiler/checkpoint/eventEmitter.cpp	2020-01-14 13:46:53.437328473 -0800
@@ -116,7 +116,9 @@
   traceid gc_root_id = 0;
   const Edge* edge = NULL;
   if (SafepointSynchronize::is_at_safepoint()) {
-    edge = (const Edge*)(sample->object())->mark().to_pointer();
+    if (!sample->object()->mark().is_marked()) {
+      edge = (const Edge*)(sample->object())->mark().to_pointer();
+    }
   }
   if (edge == NULL) {
     // In order to dump out a representation of the event