1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js
new file mode 100644
index 0000000000..f32dfa8da7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-4.js
@@ -0,0 +1,20 @@
+// 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 must return correct index(undefined)
+---*/
+
+var obj = {
+  toString: function() {
+    return undefined;
+  }
+};
+var _undefined1 = undefined;
+var _undefined2;
+var a = new Array(_undefined1, _undefined2, undefined, true, 0, false, null, 1, "undefined", obj, 1);
+
+assert.sameValue(a.lastIndexOf(undefined), 2, 'a.lastIndexOf(undefined)');
+
+reportCompare(0, 0);