java.lang.NullPointerException
   at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:316)
   at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:322)
   at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:322)
   at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:322)
   at org.netbeans.modules.csl.navigation.ElementNode.updateRecursively(ElementNode.java:279)
   at org.netbeans.modules.csl.navigation.ClassMemberPanelUI$4.run(ClassMemberPanelUI.java:228)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:424)
   at org.netbeans.modules.csl.navigation.ClassMemberPanelUI.refresh(ClassMemberPanelUI.java:234)
   at org.netbeans.modules.csl.navigation.ElementScanningTask.run(ElementScanningTask.java:252)
   at org.netbeans.modules.csl.navigation.ClassMemberNavigatorSourceFactory$ProxyElementScanningTask.run(ClassMemberNavigatorSourceFactory.java:138)
   at org.netbeans.modules.csl.navigation.ClassMemberNavigatorSourceFactory$ProxyElementScanningTask.run(ClassMemberNavigatorSourceFactory.java:110)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:558)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:734)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
   at java.util.concurrent.FutureTask.run(FutureTask.java:166)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
   at java.lang.Thread.run(Thread.java:722)