diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/ion/bug725003.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/ion/bug725003.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function TestCase(n, d, e, a) {
+  this.name = n;
+  this.description = d;
+  this.expect = e;
+  this.actual = a;
+  this.passed = getTestCaseResult(e, a);
+  this.reason = '';
+}
+function getTestCaseResult(expected, actual) {}
+var obj = new Function();
+for (var i = 0; i < 100; i++) {
+        obj['-1'] = new Array();
+    assertEq(obj['-1'] == null, false);
+    obj = new TestCase();
+}