java.lang.NullPointerException
   at org.netbeans.lib.editor.util.swing.DocumentUtilities.getDocumentVersion(DocumentUtilities.java:892)
   at org.netbeans.modules.java.hints.providers.spi.PositionRefresherHelper$DocumentVersion.<init>(PositionRefresherHelper.java:90)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask$HintPositionRefresherHelper.setVersion(HintsTask.java:210)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask$HintPositionRefresherHelper.access$100(HintsTask.java:188)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:124)
   at org.netbeans.modules.java.hints.spiimpl.hints.HintsTask.run(HintsTask.java:83)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   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)