java.lang.ClassCastException: com.sun.tools.javac.tree.JCTree$JCBlock cannot be cast to com.sun.source.tree.ExpressionTree
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.rewriteChildren(ImmutableTreeTranslator.java:836)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitExpressionStatement(ImmutableTreeTranslator.java:409)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitExpressionStatement(ImmutableTreeTranslator.java:92)
   at com.sun.tools.javac.tree.JCTree$JCExpressionStatement.accept(JCTree.java:1178)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.translate(ImmutableTreeTranslator.java:134)
   at org.netbeans.api.java.source.TreeUtilities$1.translate(TreeUtilities.java:959)
   at org.netbeans.api.java.source.TreeUtilities.translate(TreeUtilities.java:968)
   at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:502)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:651)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:668)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:655)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:482)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:583)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:150)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:134)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:200)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:197)
   at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(FileChangedManager.java:168)
   at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(ProvidedExtensions.java:360)
   at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Utilities.java:72)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:197)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:102)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:432)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:403)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:676)
   at org.netbeans.modules.java.hints.spiimpl.JavaFixImpl.implement(JavaFixImpl.java:92)
   at org.netbeans.modules.editor.hints.HintsUI$1.run(HintsUI.java:783)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)