java.lang.ClassCastException: com.sun.tools.javac.tree.JCTree$JCExpressionStatement cannot be cast to com.sun.source.tree.ExpressionTree
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.rewriteChildren(ImmutableTreeTranslator.java:987)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitAssignment(ImmutableTreeTranslator.java:441)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.visitAssignment(ImmutableTreeTranslator.java:94)
   at com.sun.tools.javac.tree.JCTree$JCAssign.accept(JCTree.java:1476)
   at org.netbeans.modules.java.source.transform.ImmutableTreeTranslator.translate(ImmutableTreeTranslator.java:136)
   at org.netbeans.api.java.source.TreeUtilities$1.translate(TreeUtilities.java:963)
   at org.netbeans.api.java.source.TreeUtilities.translate(TreeUtilities.java:972)
   at org.netbeans.api.java.source.WorkingCopy.processCurrentCompilationUnit(WorkingCopy.java:597)
   at org.netbeans.api.java.source.WorkingCopy.getChanges(WorkingCopy.java:776)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:647)
   at org.netbeans.api.java.source.JavaSource$1.run(JavaSource.java:634)
   at org.netbeans.api.java.source.JavaSource$MultiTask.run(JavaSource.java:488)
   at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(TaskProcessor.java:584)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:155)
   at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(ParserManager.java:139)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:201)
   at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(TaskProcessor.java:198)
   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.impl.Utilities.runPriorityIO(Utilities.java:74)
   at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(TaskProcessor.java:198)
   at org.netbeans.modules.parsing.api.ParserManager.parse(ParserManager.java:106)
   at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:438)
   at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:409)
   at org.netbeans.api.java.source.JavaSource.runModificationTask(JavaSource.java:655)
   at org.netbeans.modules.java.hints.spiimpl.JavaFixImpl.implement(JavaFixImpl.java:95)
   at org.netbeans.modules.editor.hints.HintsUI$1.run(HintsUI.java:788)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2048)