java.lang.NullPointerException
   at org.netbeans.modules.java.editor.JavaEditorWarmUpTask.run(JavaEditorWarmUpTask.java:153)
   at org.netbeans.core.WarmUpSupport.run(WarmUpSupport.java:90)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)