diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/loops/bug684621.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/loops/bug684621.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+function runRichards() {
+    queue = new Packet;
+    Packet(queue, ID_DEVICE_A, KIND_DEVICE);
+    new Packet;
+}
+var ID_DEVICE_A = 4;
+var KIND_DEVICE = 0;
+Packet = function (queue) {
+    this.link = null
+    if (queue == null) return;
+    var peek, next = queue;
+    while ((peek = next.link) != null)
+    ID_HANDLER_B
+};
+runRichards()