Fix issue with Map/SetIterator and types

test/mjsunit/regress/regress-3281.js

Index: test/mjsunit/regress/regress-3281.js
diff --git a/test/mjsunit/regress/regress-3281.js b/test/mjsunit/regress/regress-3281.js
new file mode 100644
index 0000000000000000000000000000000000000000..ebb25991d8510eb1c7441900a0f41cdaac502cf2
--- /dev/null
+++ b/test/mjsunit/regress/regress-3281.js
@@ -0,0 +1,13 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax --harmony-collections
+
+// Should not crash or raise an exception.
+
+var s = new Set();
+var setIterator = %SetCreateIterator(s, 2);
+
+var m = new Map();
+var mapIterator = %MapCreateIterator(m, 2);