java.lang.NullPointerException
        at javax.swing.text.JTextComponent.getCaretPosition(JTextComponent.java:1412)
        at org.netbeans.napi.gsfret.source.support.CaretAwareSourceTaskFactory$ComponentListener$1.run(CaretAwareSourceTaskFactory.java:167)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)