java.lang.AssertionError
   at org.netbeans.modules.web.el.ELElement.findNodeAt(ELElement.java:113)
   at org.netbeans.modules.web.el.completion.ELCodeCompletionHandler.getTargetNode(ELCodeCompletionHandler.java:177)
   at org.netbeans.modules.web.el.completion.ELCodeCompletionHandler.complete(ELCodeCompletionHandler.java:99)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.addCodeCompletionItems(GsfCompletionProvider.java:610)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.resolveCompletion(GsfCompletionProvider.java:598)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.access$400(GsfCompletionProvider.java:246)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery$1.run(GsfCompletionProvider.java:336)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:154)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:138)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.impl.TaskProcessor$1.call(TaskProcessor.java:198)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:356)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:66)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.modules.csl.editor.completion.GsfCompletionProvider$JavaCompletionQuery.query(GsfCompletionProvider.java:322)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.AssertionError