1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js
new file mode 100644
index 0000000000..a9bbce058e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-2-12.js
@@ -0,0 +1,29 @@
+// 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 - 'length' is own accessor property
+    without a get function that overrides an inherited accessor
+    property on an Array-like object
+---*/
+
+Object.defineProperty(Object.prototype, "length", {
+  get: function() {
+    return 20;
+  },
+  configurable: true
+});
+
+var obj = {
+  1: 1
+};
+Object.defineProperty(obj, "length", {
+  set: function() {},
+  configurable: true
+});
+
+assert.sameValue(Array.prototype.lastIndexOf.call(obj, 1), -1, 'Array.prototype.lastIndexOf.call(obj, 1)');
+
+reportCompare(0, 0);