java.lang.NullPointerException
	at org.netbeans.lib.editor.bookmarks.actions.ToggleBookmarkAction$BookmarkButtonModel.rebuild(ToggleBookmarkAction.java:200)
	at org.netbeans.lib.editor.bookmarks.actions.ToggleBookmarkAction$BookmarkButtonModel.propertyChange(ToggleBookmarkAction.java:159)
	at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:161)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:270)
	at java.awt.Component.firePropertyChange(Component.java:7172)
	at org.openide.text.QuietEditorPane.firePropertyChange(QuietEditorPane.java:149)
	at javax.swing.text.JTextComponent.setCaret(JTextComponent.java:560)
	at org.openide.text.QuietEditorPane.setCaret(QuietEditorPane.java:166)
	at org.netbeans.editor.BaseTextUI.uninstallUI(BaseTextUI.java:251)
	at javax.swing.JComponent.setUI(JComponent.java:646)
	at javax.swing.text.JTextComponent.setUI(JTextComponent.java:298)
	at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:308)
	at org.netbeans.editor.BaseKit.deinstall(BaseKit.java:683)
	at javax.swing.JEditorPane.setEditorKit(JEditorPane.java:955)
[catch] at org.openide.text.CloneableEditor$1.run(CloneableEditor.java:133)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)