diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug712169.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug712169.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// |jit-test| slow;
+
+// Binary: cache/js-dbg-32-f98c57415d8d-linux
+// Flags:
+//
+
+try {
+  var str = '0123456789';
+  for (var icount = 0; icount < 25; ++icount, let(icount2, printStatus) (function() gczeal(2))[1]++)
+        str = str + str;
+} catch(ex) {
+  new Date( str, false, (new RegExp('[0-9]{3}')).test('23 2 34 78 9 09'));
+}
+this.toSource();