java.lang.AssertionError: Seeking for: 'EmptyPHP.php'@b07b86 parent: null indexOf: -1
with parent: 'Source Files'@7dad3b parent: org.openide.explorer.view.VisualizerChildren@a68e82 indexOf: 0
Seeking in : org.openide.explorer.view.VisualizerChildren@5f5681
  0 = 'index.php'@f81c8a parent: org.openide.explorer.view.VisualizerChildren@5f5681 indexOf: 1
  1 = 'index.php'@f81c8a parent: org.openide.explorer.view.VisualizerChildren@5f5681 indexOf: 1

	at org.openide.explorer.view.VisualizerChildren.getIndex(VisualizerChildren.java:159)
	at org.openide.explorer.view.VisualizerNode.getIndex(VisualizerNode.java:278)
	at javax.swing.tree.DefaultTreeModel.nodeChanged(DefaultTreeModel.java:256)
	at org.openide.explorer.view.NodeTreeModel$Listener.update(NodeTreeModel.java:258)
	at org.openide.explorer.view.VisualizerNode.run(VisualizerNode.java:464)
	at org.openide.util.Mutex.readAccess(Mutex.java:362)
	at org.openide.explorer.view.VisualizerNode.run(VisualizerNode.java:443)
	at org.openide.util.Mutex.readAccess(Mutex.java:362)
[catch] at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:676)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)