1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-of/arguments-unmapped-mutation.js b/js/src/tests/test262/language/statements/for-of/arguments-unmapped-mutation.js
new file mode 100644
index 0000000000..a3feb3ea63
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-of/arguments-unmapped-mutation.js
@@ -0,0 +1,27 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 13.6.4
+description: Unmapped arguments object mutation during traversal using for..of
+info: |
+    "Unmapped" arguments objects should be able to be traversed using a
+    `for..of` loop, and dynamic changes to their contents should be reflected
+    in the iterated values.
+flags: [noStrict]
+---*/
+
+var expected = [1, 4, 6];
+var i = 0;
+
+(function() {
+  'use strict';
+  for (var value of arguments) {
+    assert.sameValue(value, expected[i], 'argument at index ' + i);
+    i++;
+    arguments[i] *= 2;
+  }
+}(1, 2, 3));
+
+assert.sameValue(i, 3, 'Visits all arguments');
+
+reportCompare(0, 0);