java.lang.IllegalStateException: Race condition: usageCount = 1
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.restart(HighlightsViewFactory.java:150)
   at org.netbeans.modules.editor.lib2.view.ViewBuilder$FactoryState.init(ViewBuilder.java:619)
   at org.netbeans.modules.editor.lib2.view.ViewBuilder.<init>(ViewBuilder.java:253)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates.initChildren(ViewUpdates.java:159)
   at org.netbeans.modules.editor.lib2.view.DocumentView.initChildren(DocumentView.java:500)
   at org.netbeans.modules.editor.lib2.view.EditorBoxViewChildren.getWithChildrenValid(EditorBoxViewChildren.java:297)
   at org.netbeans.modules.editor.lib2.view.EditorBoxViewChildren.modelToViewChecked(EditorBoxViewChildren.java:705)
   at org.netbeans.modules.editor.lib2.view.EditorBoxView.modelToViewChecked(EditorBoxView.java:423)
   at org.netbeans.modules.editor.lib2.view.DocumentView.modelToViewChecked(DocumentView.java:856)
   at org.netbeans.modules.editor.lib2.view.EditorView.modelToView(EditorView.java:264)
   at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(BasicTextUI.java:1497)
   at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:1035)
   at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:1010)
   at javax.swing.text.JTextComponent.modelToView(JTextComponent.java:1400)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffViewManager.getRectForView(DiffViewManager.java:444)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffViewManager.computeDecorations(DiffViewManager.java:407)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffViewManager.updateDifferences(DiffViewManager.java:179)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffViewManager.getFirstHighlights(DiffViewManager.java:204)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffContentPanel$DiffHighlightsSequence.lookupHilites(DiffContentPanel.java:270)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffContentPanel$DiffHighlightsSequence.<init>(DiffContentPanel.java:265)
   at org.netbeans.modules.diff.builtin.visualizer.editable.DiffContentPanel.getHighlights(DiffContentPanel.java:199)
   at org.netbeans.modules.editor.lib2.highlighting.ProxyHighlightsContainer.getHighlights(ProxyHighlightsContainer.java:131)
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.fetchNextHighlight(HighlightsViewFactory.java:228)
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.updateHighlight(HighlightsViewFactory.java:212)
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.createView(HighlightsViewFactory.java:171)
   at org.netbeans.modules.editor.lib2.view.ViewBuilder.createNextView(ViewBuilder.java:350)
   at org.netbeans.modules.editor.lib2.view.ViewBuilder.createViews(ViewBuilder.java:291)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates.initChildren(ViewUpdates.java:162)
   at org.netbeans.modules.editor.lib2.view.DocumentView.initChildren(DocumentView.java:500)
   at org.netbeans.modules.editor.lib2.view.EditorBoxViewChildren.getWithChildrenValid(EditorBoxViewChildren.java:297)
   at org.netbeans.modules.editor.lib2.view.EditorBoxViewChildren.modelToViewChecked(EditorBoxViewChildren.java:705)
   at org.netbeans.modules.editor.lib2.view.EditorBoxView.modelToViewChecked(EditorBoxView.java:423)
   at org.netbeans.modules.editor.lib2.view.DocumentView.modelToViewChecked(DocumentView.java:856)
   at org.netbeans.modules.editor.lib2.view.EditorView.modelToView(EditorView.java:264)
   at javax.swing.plaf.basic.BasicTextUI$RootView.modelToView(BasicTextUI.java:1497)
   at javax.swing.plaf.basic.BasicTextUI.modelToView(BasicTextUI.java:1035)
   at org.netbeans.editor.BaseCaret.updateCaretBounds(BaseCaret.java:352)
   at org.netbeans.editor.BaseCaret.update(BaseCaret.java:665)
   at org.netbeans.editor.BaseCaret$3.run(BaseCaret.java:631)
   at org.netbeans.editor.Utilities.runInEventDispatchThread(Utilities.java:1143)
   at org.netbeans.editor.BaseCaret.dispatchUpdate(BaseCaret.java:622)
   at org.netbeans.editor.BaseCaret$ListenerImpl.componentResized(BaseCaret.java:1726)
   at java.awt.AWTEventMulticaster.componentResized(AWTEventMulticaster.java:143)
   at java.awt.Component.processComponentEvent(Component.java:6089)
   at java.awt.Component.processEvent(Component.java:6043)
   at java.awt.Container.processEvent(Container.java:2041)
   at java.awt.Component.dispatchEventImpl(Component.java:4630)
   at java.awt.Container.dispatchEventImpl(Container.java:2099)
   at java.awt.Component.dispatchEvent(Component.java:4460)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:137)
   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)