java.lang.NullPointerException
   at org.netbeans.api.java.source.ElementHandle.resolve(ElementHandle.java:141)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI$JavaDocCalculator.run(ClassMemberPanelUI.java:617)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI$JavaDocCalculator.run(ClassMemberPanelUI.java:599)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:523)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:609)
   at org.netbeans.modules.parsing.api.ParserManager$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:204)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   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.nb.DataObjectEnvFactory.runPriorityIO(DataObjectEnvFactory.java:141)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:90)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:104)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:473)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:444)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI.getJavaDocFor(ClassMemberPanelUI.java:591)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI.access$1100(ClassMemberPanelUI.java:134)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI$MyBeanTreeView.getDocumentation(ClassMemberPanelUI.java:674)
   at org.netbeans.modules.java.navigation.ClassMemberPanelUI$MyBeanTreeView.getToolTipText(ClassMemberPanelUI.java:645)
   at org.netbeans.modules.java.navigation.ToolTipManagerEx$TooltipCalculator.run(ToolTipManagerEx.java:713)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.NullPointerException