fix another test now that we don't access the IteratorResult value

test/built-ins/Iterator/concat/next-method-returns-throwing-value.js

@@ -13,8 +13,15 @@ info: |
     a. For each Record iterable of iterables, do
       ...
       v. Repeat, while innerAlive is true,
-        1. Let innerValue be ? IteratorStepValue(iteratorRecord).
-        ...
+        1. Let iteratorResult be ? IteratorStep(iteratorRecord).
+        2. If iteratorResult is done, then
+          a. Perform ? IteratorValue(iteratorResult).
+          b. Set innerAlive to false.
+        3. Else,
+          a. Let completion be Completion(GeneratorYield(iteratorResult)).
+          b. If completion is an abrupt completion, then
+            i. Return ? IteratorClose(iteratorRecord, completion).
+    ...
 features: [iterator-sequencing]
 ---*/
 
@@ -39,7 +46,8 @@ let iterable = {
 };
 
 let iterator = Iterator.concat(iterable);
+let iteratorResult = iterator.next();
 
 assert.throws(Test262Error, function() {
-  iterator.next();
+  iteratorResult.value;
 });