java.lang.AssertionError
   at org.netbeans.modules.spellchecker.DefaultLocaleQueryImplementation.getDefaultLocale(DefaultLocaleQueryImplementation.java:85)
   at org.netbeans.modules.spellchecker.DefaultLocaleQueryImplementation.findLocale(DefaultLocaleQueryImplementation.java:69)
   at org.netbeans.modules.spellchecker.api.LocaleQuery.findLocale(LocaleQuery.java:59)
   at org.netbeans.modules.spellchecker.ComponentPeer.getDictionary(ComponentPeer.java:414)
   at org.netbeans.modules.spellchecker.ComponentPeer.computeHint(ComponentPeer.java:527)
   at org.netbeans.modules.spellchecker.ComponentPeer.access$100(ComponentPeer.java:115)
   at org.netbeans.modules.spellchecker.ComponentPeer$2.run(ComponentPeer.java:154)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:641)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1123)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError
   at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:694)
   at org.netbeans.modules.spellchecker.ComponentPeer.caretUpdate(ComponentPeer.java:519)
   at javax.swing.text.JTextComponent.fireCaretUpdate(JTextComponent.java:391)
   at javax.swing.text.JTextComponent$MutableCaretEvent.fire(JTextComponent.java:4387)
   at javax.swing.text.JTextComponent$MutableCaretEvent.stateChanged(JTextComponent.java:4409)
   at org.netbeans.editor.BaseCaret$4.run(BaseCaret.java:779)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:633)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:130)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)