java.lang.NullPointerException: The element parameter cannot be null
   at org.openide.util.Parameters.notNull(Parameters.java:86)
   at org.netbeans.api.java.source.ElementHandle.create(ElementHandle.java:379)
   at org.netbeans.api.java.source.TreePathHandle.create(TreePathHandle.java:244)
   at org.netbeans.modules.editor.hints.i18n.I18NChecker.run(I18NChecker.java:222)
   at org.netbeans.modules.java.hints.infrastructure.RulesManager$WorkerImpl.createErrors(RulesManager.java:403)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.runHint(HintsInvoker.java:671)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.access$000(HintsInvoker.java:99)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker$ScannerImpl.runAndAdd(HintsInvoker.java:541)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker$ScannerImpl.scanDoNotGoDeeper(HintsInvoker.java:595)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.computeSuggestions(HintsInvoker.java:338)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.compute(HintsInvoker.java:201)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.computeHints(HintsInvoker.java:174)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsInvoker.computeHints(HintsInvoker.java:130)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsTask.run(HintsTask.java:95)
   at org.netbeans.modules.java.hints.jackpot.impl.hints.HintsTask.run(HintsTask.java:69)
   at org.netbeans.modules.java.source.JavaSourceAccessor$CancelableTaskWrapper.run(JavaSourceAccessor.java:298)
   at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:655)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
   at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
   at java.util.concurrent.FutureTask.run(FutureTask.java:138)
   at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
   at java.lang.Thread.run(Thread.java:619)