diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug578044.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug578044.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+this.watch("x", Object.create)
+try {
+  (function() {
+    this.__defineGetter__("x",
+    function() {
+      return this
+    })
+  })()
+} catch(e) {}
+Object.defineProperty(x, "x", ({
+  set: Uint16Array
+}))
+