diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testFunctionIdentityChange.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testFunctionIdentityChange.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+function testFunctionIdentityChange()
+{
+  function a() {}
+  function b() {}
+
+  var o = { a: a, b: b };
+
+  for (var prop in o)
+  {
+    for (var i = 0; i < 1000; i++)
+      o[prop]();
+  }
+
+  return true;
+}
+assertEq(testFunctionIdentityChange(), true);