java.lang.AssertionError: Null textComponent
   at org.netbeans.modules.editor.lib2.view.ViewBuilder.repaintAndReplaceViews(ViewBuilder.java:361)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates.checkRebuild(ViewUpdates.java:445)
   at org.netbeans.modules.editor.lib2.view.ViewUpdates$FactoriesListener.viewFactoryChanged(ViewUpdates.java:476)
   at org.netbeans.modules.editor.lib2.view.EditorViewFactory.fireEvent(EditorViewFactory.java:194)
   at org.netbeans.modules.editor.lib2.view.HighlightsViewFactory.highlightChanged(HighlightsViewFactory.java:225)
   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.spi.editor.highlighting.support.OffsetsBag.removeHighlights(OffsetsBag.java:439)
   at org.netbeans.modules.editor.hints.AnnotationHolder.updateHighlightsOnLine(AnnotationHolder.java:689)
   at org.netbeans.modules.editor.hints.AnnotationHolder.updateHighlightsOnLine(AnnotationHolder.java:679)
   at org.netbeans.modules.editor.hints.AnnotationHolder.setErrorDescriptionsImpl(AnnotationHolder.java:900)
   at org.netbeans.modules.editor.hints.AnnotationHolder.access$1300(AnnotationHolder.java:110)
   at org.netbeans.modules.editor.hints.AnnotationHolder$4.run(AnnotationHolder.java:809)
   at org.netbeans.editor.BaseDocument.render(BaseDocument.java:1379)
   at org.netbeans.modules.editor.hints.AnnotationHolder.setErrorDescriptions(AnnotationHolder.java:806)
   at org.netbeans.modules.editor.hints.HintsControllerImpl.setErrorsImpl(HintsControllerImpl.java:108)
   at org.netbeans.modules.editor.hints.HintsControllerImpl.setErrors(HintsControllerImpl.java:90)
   at org.netbeans.spi.editor.hints.HintsController$1.run(HintsController.java:76)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1369)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1907)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.AssertionError: Null textComponent
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:368)
   at org.netbeans.spi.editor.hints.HintsController.setErrors(HintsController.java:74)
   at org.netbeans.modules.javafx.editor.semantic.UpToDateStatusTask.process(UpToDateStatusTask.java:214)
   at org.netbeans.modules.javafx.editor.semantic.UpToDateStatusTask.run(UpToDateStatusTask.java:135)
   at org.netbeans.modules.javafx.editor.semantic.UpToDateStatusTask.run(UpToDateStatusTask.java:87)
   at org.netbeans.modules.javafx.source.parsing.JavaFXSourceCancelableTask.run(JavaFXSourceCancelableTask.java:103)
   at org.netbeans.modules.javafx.source.parsing.JavaFXSourceCancelableTask.run(JavaFXSourceCancelableTask.java:58)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:654)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:619)