java.lang.NullPointerException
        at org.netbeans.lib.editor.util.swing.DocumentUtilities.addPriorityDocumentListener(DocumentUtilities.java:127)
        at org.netbeans.lib.editor.util.swing.DocumentUtilities.addDocumentListener(DocumentUtilities.java:105)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.attachTo(TodoAnnotationProvider.java:164)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.attachTo(TodoAnnotationProvider.java:173)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider$ScanningListener.access$000(TodoAnnotationProvider.java:136)
        at org.netbeans.modules.showtodos.TodoAnnotationProvider.annotate(TodoAnnotationProvider.java:92)
        at org.openide.text.CloneableEditorSupport.ensureAnnotationsLoaded(CloneableEditorSupport.java:378)
        at org.openide.text.CloneableEditor$DoInitialize$3.run(CloneableEditor.java:772)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
        at org.openide.util.RequestProcessor.post(RequestProcessor.java:292)
        at org.openide.text.CloneableEditor$DoInitialize.initRest(CloneableEditor.java:770)
        at org.openide.text.CloneableEditor$DoInitialize.run(CloneableEditor.java:351)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1084)