1 files changed, 24 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js
new file mode 100644
index 0000000000..55b9946bcf
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-8-a-6.js
@@ -0,0 +1,24 @@
+// 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 -  deleted properties of step 5 are
+    visible here on an Array
+---*/
+
+var arr = [];
+arr[10] = "10";
+arr.length = 20;
+
+var fromIndex = {
+  valueOf: function() {
+    delete arr[10];
+    return 11;
+  }
+};
+
+assert.sameValue(arr.lastIndexOf("10", fromIndex), -1, 'arr.lastIndexOf("10", fromIndex)');
+
+reportCompare(0, 0);