1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js
new file mode 100644
index 0000000000..d03a424288
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/concat/Array.prototype.concat_array-like-primitive-non-number-length.js
@@ -0,0 +1,32 @@
+// Copyright (c) 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.
+
+/*---
+esid: sec-array.prototype.concat
+description: Array.prototype.concat array like primitive non number length
+includes: [compareArray.js]
+features: [Symbol.isConcatSpreadable]
+---*/
+var obj = {
+  "1": "A",
+  "3": "B",
+  "5": "C"
+};
+obj[Symbol.isConcatSpreadable] = true;
+obj.length = {
+  toString: function() {
+    return "SIX";
+  },
+  valueOf: null
+};
+assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');
+obj.length = {
+  toString: null,
+  valueOf: function() {
+    return "SIX";
+  }
+};
+assert.compareArray([].concat(obj), [], '[].concat({"1": "A", "3": "B", "5": "C"}) must return []');
+
+reportCompare(0, 0);