1 files changed, 21 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js
new file mode 100644
index 0000000000..99a2fbb219
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Array/prototype/filter/15.4.4.20-1-12.js
@@ -0,0 +1,21 @@
+// 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.filter
+description: Array.prototype.filter applied to RegExp object
+---*/
+
+function callbackfn(val, idx, obj) {
+  return obj instanceof RegExp;
+}
+
+var obj = new RegExp();
+obj.length = 2;
+obj[1] = true;
+
+var newArr = Array.prototype.filter.call(obj, callbackfn);
+
+assert.sameValue(newArr[0], true, 'newArr[0]');
+
+reportCompare(0, 0);