diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/testBug628564.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/testBug628564.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+x = 0
+for (a = 0; a < 13; ++a) {
+  if (a == 7) {
+    if (!x) {
+      __defineSetter__("x", Object.defineProperties)
+    }
+  }
+}