diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug679810.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug679810.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// Binary: cache/js-dbg-64-2d95fc517e57-linux
+// Flags: -m -n
+//
+
+function WorkerBee(name, dept, projs) {
+    this.projects &= projs || new Array();
+}
+function Engineer(name, projs, machine) {
+    this.base = WorkerBee;
+    this.base(name, "engineering", projs)
+    this.machine = machine || "";
+}
+Engineer.prototype = {};
+var les = new Engineer("Morris, Les", new Array("JavaScript"), "indy");