java.lang.NullPointerException: Null child at index 7, parent: Root, model: org.netbeans.spi.viewmodel.Models$CompoundModel@14d7a8e
  TreeModel = org.netbeans.spi.viewmodel.Models$DelegatingTreeModel@191c9a
    org.netbeans.modules.cnd.debugger.common2.debugger.StackModel@1824964
  NodeModel =     org.netbeans.modules.cnd.debugger.common2.debugger.StackModel@1824964
  TableModel = org.netbeans.spi.viewmodel.Models$DelegatingTableModel@186ef82
    org.netbeans.modules.cnd.debugger.common2.debugger.StackModel@1824964
  NodeActionsProvider = org.netbeans.spi.viewmodel.Models$DelegatingNodeActionsProvider@a4e97e
    org.netbeans.modules.cnd.debugger.common2.debugger.StackModel@1824964
  ColumnsModel = [org.netbeans.modules.cnd.debugger.common2.debugger.StackColumnModels$Number@a0849b, org.netbeans.modules.cnd.debugger.common2.debugger.StackColumnModels$Optimized@6217ee, org.netbeans.modules.cnd.debugger.common2.debugger.StackColumnModels$CurrentPC@113690, org.netbeans.modules.cnd.debugger.common2.debugger.StackCo
   at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.applyChildren(TreeModelNode.java:1418)
   at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.refreshLazyChildren(TreeModelNode.java:1395)
   at org.netbeans.modules.viewmodel.TreeModelNode$TreeModelChildren.refreshChildren(TreeModelNode.java:1250)
   at org.netbeans.modules.viewmodel.TreeModelNode.refreshTheChildren(TreeModelNode.java:857)
   at org.netbeans.modules.viewmodel.TreeModelNode.refreshTheChildren(TreeModelNode.java:840)
   at org.netbeans.modules.viewmodel.TreeModelNode$5.run(TreeModelNode.java:587)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:199)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:148)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused: java.lang.reflect.InvocationTargetException
   at java.awt.EventQueue.invokeAndWait(EventQueue.java:998)
   at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1326)
   at org.netbeans.modules.viewmodel.TreeModelNode$5.run(TreeModelNode.java:570)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)