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I was debugging with a recent NB 6.0 build (post M10) and got an ArrayIndexOutOfBoundsException while the Watch Window was up (after I'd added some watches). java.lang.ArrayIndexOutOfBoundsException: node has no children at javax.swing.tree.DefaultMutableTreeNode.getChildAt(DefaultMutableTreeNode.java:228) at javax.swing.tree.VariableHeightLayoutCache.treeNodesRemoved(VariableHeightLayoutCache.java:543) at javax.swing.plaf.basic.BasicTreeUI$Handler.treeNodesRemoved(BasicTreeUI.java:3917) at javax.swing.tree.DefaultTreeModel.fireTreeNodesRemoved(DefaultTreeModel.java:530) at javax.swing.tree.DefaultTreeModel.nodesWereRemoved(DefaultTreeModel.java:310) at org.openide.explorer.view.NodeTreeModel$Listener.removed(NodeTreeModel.java:175) at org.openide.explorer.view.VisualizerChildren.removed(VisualizerChildren.java:143) at org.openide.explorer.view.VisualizerEvent$Removed.run(VisualizerEvent.java:123) at org.openide.util.Mutex.readAccess(Mutex.java:296) at org.openide.explorer.view.VisualizerNode$QP.run(VisualizerNode.java:660) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) [catch] 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)
Explorer issue.
*** This issue has been marked as a duplicate of 85770 ***