java.lang.IllegalArgumentException: Comparison method violates its general contract!
   at java.util.TimSort.mergeHi(TimSort.java:0)
   at java.util.TimSort.mergeAt(TimSort.java:0)
   at java.util.TimSort.mergeForceCollapse(TimSort.java:0)
   at java.util.TimSort.sort(TimSort.java:0)
   at java.util.TimSort.sort(TimSort.java:0)
   at java.util.Arrays.sort(Arrays.java:0)
   at java.util.Collections.sort(Collections.java:0)
   at org.netbeans.swing.etable.ETable.sortAndFilter(ETable.java:1715)
   at org.netbeans.swing.etable.ETable.convertRowIndexToView(ETable.java:1471)
   at org.netbeans.swing.etable.ETable.changeSelectionInModel(ETable.java:1134)
   at org.netbeans.swing.etable.ETable.tableChanged(ETable.java:1284)
   at org.netbeans.swing.outline.Outline.tableChanged(Outline.java:879)
   at org.netbeans.swing.outline.EventBroadcaster.fireTableChange(EventBroadcaster.java:221)
   at org.netbeans.swing.outline.EventBroadcaster.fireTableChange(EventBroadcaster.java:247)
   at org.netbeans.swing.outline.EventBroadcaster.treeNodesInserted(EventBroadcaster.java:377)
   at org.openide.explorer.view.NodeTreeModel.nodesWereInsertedInternal(NodeTreeModel.java:187)
   at org.openide.explorer.view.NodeTreeModel$Listener.added(NodeTreeModel.java:242)
   at org.openide.explorer.view.VisualizerChildren.added(VisualizerChildren.java:248)
   at org.openide.explorer.view.VisualizerEvent$Added.run(VisualizerEvent.java:110)
   at org.openide.util.Mutex.readAccess(Mutex.java:365)
   at org.openide.util.Mutex$1R.run(Mutex.java:1307)
   at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1920)
   at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1326)
   at org.openide.util.Mutex.readAccess(Mutex.java:354)
   at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:682)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:0)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:0)
   at java.awt.EventQueue.access$000(EventQueue.java:0)
   at java.awt.EventQueue$3.run(EventQueue.java:0)
   at java.awt.EventQueue$3.run(EventQueue.java:0)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:0)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:0)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:0)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:0)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:0)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:0)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:0)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:0)