1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-in/cptn-decl-skip-itr.js b/js/src/tests/test262/language/statements/for-in/cptn-decl-skip-itr.js
new file mode 100644
index 0000000000..7ee1ac90c2
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-in/cptn-decl-skip-itr.js
@@ -0,0 +1,27 @@
+// 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 a declaration and iteration is skipped
+info: |
+    IterationStatement : for ( var ForBinding in Expression ) Statement
+
+    1. Let keyResult be ForIn/OfHeadEvaluation( « », Expression, enumerate).
+    2. ReturnIfAbrupt(keyResult).
+
+    13.7.5.12 Runtime Semantics: ForIn/OfHeadEvaluation
+
+    [...]
+    7. If iterationKind is enumerate, then
+       a. If exprValue.[[value]] is null or undefined, then
+          i. Return Completion{[[type]]: break, [[value]]: empty, [[target]]:
+             empty}.
+---*/
+
+assert.sameValue(eval('1; for (var a in undefined) { }'), undefined);
+assert.sameValue(eval('2; for (var b in undefined) { 3; }'), undefined);
+assert.sameValue(eval('4; for (var c in null) { }'), undefined);
+assert.sameValue(eval('5; for (var d in null) { 6; }'), undefined);
+
+reportCompare(0, 0);