--- old/src/share/vm/runtime/handles.cpp	2019-02-15 19:02:41.602687482 +0300
+++ new/src/share/vm/runtime/handles.cpp	2019-02-15 19:02:41.494691255 +0300
@@ -72,7 +72,8 @@
   while (bottom < top) {
     // This test can be moved up but for now check every oop.
 
-    assert((*bottom)->is_oop(), "handle should point to oop");
+    // JFR is known to set mark word to 0 for duration of leak analysis VM operaiton
+    assert((*bottom)->is_oop(INCLUDE_JFR), "handle should point to oop");
 
     f->do_oop(bottom++);
   }