java.lang.NullPointerException
   at com.oracle.nashorn.ir.LiteralNode.equals(LiteralNode.java:80)
   at com.oracle.nashorn.ir.UnaryNode.equals(UnaryNode.java:105)
   at com.oracle.nashorn.ir.BinaryNode.equals(BinaryNode.java:105)
   at com.oracle.nashorn.ir.BinaryNode.equals(BinaryNode.java:108)
   at com.oracle.nashorn.ir.TernaryNode.equals(TernaryNode.java:62)
   at com.oracle.nashorn.ir.UnaryNode.equals(UnaryNode.java:105)
   at com.oracle.nashorn.ir.BinaryNode.equals(BinaryNode.java:105)
   at com.oracle.nashorn.ir.BaseNode.equals(BaseNode.java:59)
   at com.oracle.nashorn.ir.AccessNode.equals(AccessNode.java:62)
   at java.util.ArrayList.indexOf(ArrayList.java:269)
   at java.util.ArrayList.contains(ArrayList.java:252)
   at org.netbeans.modules.javascript2.editor.model.impl.ModelVisitor.leave(ModelVisitor.java:159)
   at com.oracle.nashorn.ir.AccessNode.accept(AccessNode.java:82)
   at com.oracle.nashorn.ir.CallNode.accept(CallNode.java:212)
   at com.oracle.nashorn.ir.TernaryNode.accept(TernaryNode.java:82)
   at com.oracle.nashorn.ir.ExecuteNode.accept(ExecuteNode.java:79)
   at org.netbeans.modules.javascript2.editor.model.impl.ModelVisitor.enter(ModelVisitor.java:486)
   at com.oracle.nashorn.ir.FunctionNode.accept(FunctionNode.java:308)
   at org.netbeans.modules.javascript2.editor.model.impl.ModelVisitor.enter(ModelVisitor.java:479)
   at com.oracle.nashorn.ir.FunctionNode.accept(FunctionNode.java:308)
   at org.netbeans.modules.javascript2.editor.model.Model.getModelVisitor(Model.java:86)
   at org.netbeans.modules.javascript2.editor.model.Model.getGlobalObject(Model.java:96)
   at org.netbeans.modules.javascript2.editor.index.JsIndexer.index(JsIndexer.java:90)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor$3.run(Indexable.java:216)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater.runIndexer(RepositoryUpdater.java:267)
   at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:214)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$3.run(RepositoryUpdater.java:2850)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:153)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:137)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:198)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.indexEmbedding(RepositoryUpdater.java:2806)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doIndex(RepositoryUpdater.java:2593)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.access$1500(RepositoryUpdater.java:2096)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2405)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work$2.run(RepositoryUpdater.java:2403)
   at org.netbeans.modules.parsing.impl.indexing.errors.TaskCache.refreshTransaction(TaskCache.java:544)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:2403)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2915)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:3290)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:3022)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:5313)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.access$4800(RepositoryUpdater.java:4993)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2$1.run(RepositoryUpdater.java:5238)
   at org.netbeans.modules.parsing.impl.RunWhenScanFinishedSupport.performScan(RunWhenScanFinishedSupport.java:96)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5234)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task$2.call(RepositoryUpdater.java:5230)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:176)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:5230)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)