java.lang.AssertionError: Null textComponent
   at org.netbeans.modules.editor.lib2.view.ViewBuilder.repaintAndReplaceViews(ViewBuilder.java:340)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates.checkRebuild(ViewUpdates.java:424)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates$FactoriesListener.viewFactoryChanged(ViewUpdates.java:452)
   at org.netbeans.modules.editor.lib2.view.EditorViewFactory.fireEvent(EditorViewFactory.java:194)
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.highlightChanged(HighlightsViewFactory.java:226)
   at org.netbeans.spi.editor.highlighting.support.AbstractHighlightsContainer.fireHighlightsChange(AbstractHighlightsContainer.java:110)
   at org.netbeans.modules.editor.lib2.highlighting.CompoundHighlightsContainer.access$100(CompoundHighlightsContainer.java:64)
   at org.netbeans.modules.editor.lib2.highlighting.CompoundHighlightsContainer$2.run(CompoundHighlightsContainer.java:303)
   at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1379)
   at org.netbeans.modules.editor.lib2.highlighting.CompoundHighlightsContainer.layerChanged(CompoundHighlightsContainer.java:301)
   at org.netbeans.modules.editor.lib2.highlighting.CompoundHighlightsContainer.access$400(CompoundHighlightsContainer.java:64)
   at org.netbeans.modules.editor.lib2.highlighting.CompoundHighlightsContainer$LayerListener.highlightChanged(CompoundHighlightsContainer.java:481)
   at org.netbeans.spi.editor.highlighting.support.AbstractHighlightsContainer.fireHighlightsChange(AbstractHighlightsContainer.java:110)
   at org.netbeans.modules.editor.lib2.highlighting.CaretBasedBlockHighlighting.updateLineInfo(CaretBasedBlockHighlighting.java:197)
   at org.netbeans.modules.editor.lib2.highlighting.CaretBasedBlockHighlighting.stateChanged(CaretBasedBlockHighlighting.java:166)
   at org.openide.util.WeakListenerImpl$Change.stateChanged(WeakListenerImpl.java:321)
   at org.netbeans.editor.BaseCaret$4.run(BaseCaret.java:794)
   at org.netbeans.editor.Utilities.runInEventDispatchThread(Utilities.java:1119)
   at org.netbeans.editor.BaseCaret.fireStateChanged(BaseCaret.java:805)
   at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:1098)
   at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:1119)
   at org.netbeans.editor.BaseCaret.setDot(BaseCaret.java:1022)
   at javax.swing.text.JTextComponent.setCaretPosition(JTextComponent.java:1652)
   at org.netbeans.modules.diff.builtin.visualizer.editable.EditableDiffView$TextualDiffRefreshTask$1.run(EditableDiffView.java:1115)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:133)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)