java.lang.AssertionError
        at org.netbeans.modules.parsing.impl.event.EventSupport$EditorRegistryListener.propertyChange(EventSupport.java:361)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:270)
        at java.awt.Component.firePropertyChange(Component.java:7277)
        at org.openide.text.QuietEditorPane.firePropertyChange(QuietEditorPane.java:202)
        at javax.swing.JComponent.putClientProperty(JComponent.java:3838)
        at org.netbeans.modules.editor.impl.highlighting.ComposedTextHighlighting.enableParsing(ComposedTextHighlighting.java:239)
        at org.netbeans.modules.editor.impl.highlighting.ComposedTextHighlighting.insertUpdate(ComposedTextHighlighting.java:125)
        at org.openide.util.WeakListenerImpl$Document.insertUpdate(WeakListenerImpl.java:262)
        at org.netbeans.lib.editor.util.swing.PriorityDocumentListenerList.insertUpdate(PriorityDocumentListenerList.java:79)
        at javax.swing.text.AbstractDocument.fireInsertUpdate(AbstractDocument.java:184)
        at org.netbeans.editor.BaseDocument.fireInsertUpdate(BaseDocument.java:1618)
        at org.netbeans.editor.BaseDocument.insertString(BaseDocument.java:778)
        at javax.swing.text.JTextComponent.replaceInputMethodText(JTextComponent.java:3584)
        at javax.swing.text.JTextComponent.processInputMethodEvent(JTextComponent.java:3321)
        at java.awt.Component.processEvent(Component.java:5384)
        at java.awt.Container.processEvent(Container.java:2010)
        at java.awt.Component.dispatchEventImpl(Component.java:4068)
        at java.awt.Container.dispatchEventImpl(Container.java:2068)
        at java.awt.Component.dispatchEvent(Component.java:3903)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
        at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:104)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)