src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/AssignSymbols.java

*** 801,811 ****
          return new RuntimeNode(unaryNode, request, args);
      }
  
      @Override
      public Node leaveForNode(final ForNode forNode) {
!         if (forNode.isForIn()) {
              return forNode.setIterator(lc, newObjectInternal(ITERATOR_PREFIX)); //NASHORN-73
          }
  
          return end(forNode);
      }
--- 801,811 ----
          return new RuntimeNode(unaryNode, request, args);
      }
  
      @Override
      public Node leaveForNode(final ForNode forNode) {
!         if (forNode.isForIn() || forNode.isForOf()) {
              return forNode.setIterator(lc, newObjectInternal(ITERATOR_PREFIX)); //NASHORN-73
          }
  
          return end(forNode);
      }