java.lang.NullPointerException
	at org.netbeans.lib.lexer.inc.TokenListListUpdate.createJoinTokenListChange(TokenListListUpdate.java:269)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate$UpdateItem.update(TokenHierarchyUpdate.java:328)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.processLevelInfos(TokenHierarchyUpdate.java:226)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.updateImpl(TokenHierarchyUpdate.java:197)
	at org.netbeans.lib.lexer.inc.TokenHierarchyUpdate.update(TokenHierarchyUpdate.java:135)
	at org.netbeans.lib.lexer.TokenHierarchyOperation.textModified(TokenHierarchyOperation.java:604)
	at org.netbeans.spi.lexer.TokenHierarchyControl.textModified(TokenHierarchyControl.java:96)
	at org.netbeans.lib.lexer.inc.DocumentInput.textModified(DocumentInput.java:152)
	at org.netbeans.lib.lexer.inc.DocumentInput.removeUpdate(DocumentInput.java:145)
	at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.removeUpdate(PriorityDocumentListenerList.java:116)
	at javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:259)
	at org.netbeans.editor.BaseDocument.fireRemoveUpdate(BaseDocument.java:1627)
	at org.netbeans.editor.BaseDocument.handleRemove(BaseDocument.java:1021)
	at org.netbeans.editor.BaseDocument$FilterBypassImpl.remove(BaseDocument.java:2493)
	at javax.swing.text.DocumentFilter.remove(DocumentFilter.java:79)
	at org.openide.text.CloneableEditorSupport$DocFilter.remove(CloneableEditorSupport.java:2341)
	at org.netbeans.editor.BaseDocument.remove(BaseDocument.java:937)
	at org.netbeans.jellytools.EditorOperator$4.map(EditorOperator.java:418)
	at org.netbeans.jemmy.operators.Operator$MapVoidAction.launch(Operator.java:1411)
	at org.netbeans.jemmy.QueueTool$QueueAction.run(QueueTool.java:562)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:301)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:744)
	at java.awt.EventQueue.access$400(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:697)
	at java.awt.EventQueue$3.run(EventQueue.java:691)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:714)
	at org.netbeans.jemmy.QueueTool$JemmyQueue.dispatchEvent(QueueTool.java:609)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)