diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug600424.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug600424.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// vim: set ts=8 sts=4 et sw=4 tw=99:
+function f(a) {
+    var x = {
+        g: function () {
+            return this.a;
+        }
+    };
+    x.g.prototype.a = a;
+    assertEq(x.g.prototype.a, a);
+    return x;
+}
+f(1);
+f(2);
+f(3);