1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js
new file mode 100644
index 0000000000..f9a2d957c3
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-14.js
@@ -0,0 +1,25 @@
+// 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 -  deleting property of prototype
+    causes prototype index property not to be visited on an Array
+---*/
+
+var arr = [0, , 2];
+
+Object.defineProperty(arr, "20", {
+  get: function() {
+    delete Array.prototype[1];
+    return 0;
+  },
+  configurable: true
+});
+
+Array.prototype[1] = 1;
+
+assert.sameValue(arr.lastIndexOf(1), -1, 'arr.lastIndexOf(1)');
+
+reportCompare(0, 0);