diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug528048.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug528048.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Binary: cache/js-dbg-32-761988dd0d81-linux
+// Flags: -j
+//
+for (j = 0; j < 3; j++) {}
+m = [];
+m.concat();
+n = [];
+n.concat([]);
+Function("\
+  for (i = 0; i < 8; i++)\
+  ((function f1(b, c) {\
+  if (c) {\
+    return (gc)()\
+  }\
+  f1(b, 1);\
+  ((function f2(d, e) {\
+    return d.length == e ? 0 : d[e] + f2(d, e + 1)\
+  })([{}, /x/, /x/], 0))\
+  })())\
+")()