diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug562028.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug562028.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// Binary: cache/js-dbg-64-0723bab9f15d-linux
+// Flags:
+//
+function f(code) {
+  uneval(Function(code.replace(/\/\*DUPTRY\d+/,
+    function(k) {
+      n = k.substr(8)
+      return g("try{}catch(e){}", n)
+    }
+  )))
+}
+function g(s, n) {
+  if (n == 1) return s
+  s2 = s + s
+  r = n % 2
+  d = (n - r) / 2;
+  m = g(s2, d)
+  return r ? m: m
+}
+f("if(/>/(\"\")){/*DUPTRY4968(u)}else if([]()){}")