--- old/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/OptimisticTypesCalculator.java	2016-03-24 10:55:23.536784151 +0100
+++ new/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/OptimisticTypesCalculator.java	2016-03-24 10:55:23.396784156 +0100
@@ -130,7 +130,7 @@
 
     @Override
     public boolean enterForNode(final ForNode forNode) {
-        if(forNode.isForIn()) {
+        if(forNode.isForInOrOf()) {
             // for..in has the iterable in its "modify"
             tagNeverOptimistic(forNode.getModify());
         } else {