diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug688974.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug688974.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+// Binary: cache/js-dbg-64-fecae145d884-linux
+// Flags: -m -n
+//
+
+gczeal(2);
+Object.defineProperty(Object.prototype, "b", {set: function() {}});
+function C(a, b) {
+    this.a=a;
+    this.b=b;
+}
+var f = C.bind(0x2004, 2);
+for (var i=0; i<10000; ++i)
+    new f;