1 files changed, 33 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-in/cptn-expr-itr.js b/js/src/tests/test262/language/statements/for-in/cptn-expr-itr.js
new file mode 100644
index 0000000000..9e4242dc03
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-in/cptn-expr-itr.js
@@ -0,0 +1,33 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.7.5.11
+description: >
+    Completion value when head has no declaration and iteration occurs
+info: |
+    IterationStatement : for ( LeftHandSideExpression in Expression ) Statement
+
+    1. Let keyResult be ForIn/OfHeadEvaluation( « », Expression, enumerate).
+    2. ReturnIfAbrupt(keyResult).
+    3. Return ForIn/OfBodyEvaluation(LeftHandSideExpression, Statement,
+       keyResult, assignment, labelSet).
+
+    13.7.5.13 Runtime Semantics: ForIn/OfBodyEvaluation
+
+    [...]
+    2. Let V = undefined.
+    [...]
+    5. Repeat
+       a. Let nextResult be IteratorStep(iterator).
+       b. ReturnIfAbrupt(nextResult).
+       c. If nextResult is false, return NormalCompletion(V).
+       [...]
+       k. Let result be the result of evaluating stmt.
+       [...]
+       n. If result.[[value]] is not empty, let V be result.[[value]].
+---*/
+
+assert.sameValue(eval('var a; 1; for (a in { x: 0 }) { }'), undefined);
+assert.sameValue(eval('var b; 2; for (b in { x: 0 }) { 3; }'), 3);
+
+reportCompare(0, 0);