1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js
new file mode 100644
index 0000000000..7289b10cef
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-4.js
@@ -0,0 +1,19 @@
+// Copyright (c) 2012 Ecma International.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-array.prototype.lastindexof
+description: >
+    Array.prototype.lastIndexOf when 'length' is own data property
+    that overrides an inherited data property on an Array
+---*/
+
+var targetObj = {};
+var arrProtoLen;
+
+arrProtoLen = Array.prototype.length;
+Array.prototype.length = 0;
+
+assert.sameValue([0, targetObj, 2].lastIndexOf(targetObj), 1, '[0, targetObj, 2].lastIndexOf(targetObj)');
+
+reportCompare(0, 0);