java.lang.ClassCastException: org.netbeans.jmi.javamodel.JavaPackage$Impl
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.getASTree(MetadataElement.java:1157)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.getASTree(MetadataElement.java:515)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.MetadataElement.getPosition(MetadataElement.java:521)
	at org.netbeans.modules.javacore.jmiimpl.javamodel.FeatureImpl.getPosition(FeatureImpl.java:279)
	at org.netbeans.modules.javacore.JMManager.getElementPosition(JMManager.java:725)
	at org.netbeans.modules.javacore.JMManager.getElementPosition(JMManager.java:711)
	at org.netbeans.modules.java.JavaEditor$JavaEditorComponent.findElement(JavaEditor.java:1331)
	at org.netbeans.modules.java.JavaEditor$JavaEditorComponent.createNode(JavaEditor.java:1279)
	at org.netbeans.modules.java.JavaEditor$JavaEditorComponent.access$800(JavaEditor.java:1199)
	at org.netbeans.modules.java.JavaEditor$12.run(JavaEditor.java:1251)
	at org.openide.util.Mutex.readAccess(Mutex.java:195)
	at org.netbeans.modules.java.JavaEditor$11.run(JavaEditor.java:1249)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:471)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:904)