1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/for-in/head-decl-expr.js b/js/src/tests/test262/language/statements/for-in/head-decl-expr.js
new file mode 100644
index 0000000000..7208b10a5a
--- /dev/null
+++ b/js/src/tests/test262/language/statements/for-in/head-decl-expr.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.
+
+/*---
+description: Expression is allowed in head
+info: |
+    IterationStatement : for ( ForDeclaration in Expression ) Statement
+
+    1. Let keyResult be the result of performing
+       ForIn/OfHeadEvaluation(BoundNames of ForDeclaration, Expression,
+       enumerate).
+    2. ReturnIfAbrupt(keyResult).
+    3. Return ForIn/OfBodyEvaluation(ForDeclaration, Statement, keyResult,
+       lexicalBinding, labelSet).
+es6id: 13.7.5.11
+---*/
+
+var iterCount = 0;
+
+for (let x in null, { key: 0 }) {
+  assert.sameValue(x, 'key');
+  iterCount += 1;
+}
+
+assert.sameValue(iterCount, 1);
+
+reportCompare(0, 0);