java.lang.NullPointerException
        at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport$4.propertyChange(BaseJspEditorSupport.java:176)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at org.openide.text.CloneableEditorSupport.firePropertyChange(CloneableEditorSupport.java:527)
        at org.openide.text.CloneableEditorSupport.fireDocumentChange(CloneableEditorSupport.java:2320)
        at org.openide.text.CloneableEditorSupport.closeDocument(CloneableEditorSupport.java:2201)
        at org.openide.text.CloneableEditorSupport.access$2500(CloneableEditorSupport.java:123)
        at org.openide.text.CloneableEditorSupport$StrongRef.run(CloneableEditorSupport.java:2681)
        at org.netbeans.modules.openide.util.ActiveQueue.run(ActiveQueue.java:64)
        at java.lang.Thread.run(Thread.java:619)