java.lang.NullPointerException
   at org.netbeans.lib.editor.util.swing.DocumentUtilities.addPriorityDocumentListener(DocumentUtilities.java:138)
   at org.netbeans.lib.editor.util.swing.DocumentUtilities.addDocumentListener(DocumentUtilities.java:116)
   at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.attachTo(TodoAnnotationProvider.java:169)
   at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.attachTo(TodoAnnotationProvider.java:178)
   at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.access$000(TodoAnnotationProvider.java:141)
   at org.netbeans.modules.showtodos.TodoAnnotationProvider.annotate(TodoAnnotationProvider.java:92)
   at org.openide.text.CloneableEditorSupport.ensureAnnotationsLoaded(CloneableEditorSupport.java:391)
   at org.openide.text.CloneableEditorInitializer.initAnnotations(CloneableEditorInitializer.java:642)
   at org.openide.text.CloneableEditorInitializer.run(CloneableEditorInitializer.java:351)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)