java.lang.ClassCastException: org.netbeans.lib.profiler.heap.ClassDump cannot be cast to org.netbeans.modules.profiler.heapwalk.ClassesListController$DiffJavaClass
   at org.netbeans.modules.profiler.heapwalk.ClassesListController.getData(ClassesListController.java:200)
   at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI$16$2.run(ClassesListControllerUI.java:866)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1973)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.ClassCastException: org.netbeans.lib.profiler.heap.ClassDump cannot be cast to org.netbeans.modules.profiler.heapwalk.ClassesListController$DiffJavaClass
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:425)
   at org.netbeans.modules.profiler.heapwalk.model.BrowserUtils.performTask(BrowserUtils.java:264)
   at org.netbeans.modules.profiler.heapwalk.ui.ClassesListControllerUI$16.run(ClassesListControllerUI.java:862)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:705)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:675)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:153)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)