--- a/src/hotspot/share/runtime/vframe.cpp	Tue Sep 17 09:51:02 2019 +0200
+++ b/src/hotspot/share/runtime/vframe.cpp	Tue Sep 17 09:51:02 2019 +0200
@@ -135,7 +135,7 @@
     //
     // Skip the monitor that the thread is blocked to enter or waiting on
     //
-    if (!found_first_monitor && (oopDesc::equals(obj, pending_obj) || oopDesc::equals(obj, waiting_obj))) {
+    if (!found_first_monitor && (obj == pending_obj || obj == waiting_obj)) {
       continue;
     }
     found_first_monitor = true;