diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug800407.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug800407.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// Binary: cache/js-dbg-32-5cca0408a73f-linux
+// Flags:
+//
+
+options("strict_mode");
+function test(str, arg, result) {
+    var fun = new Function('x', str);
+    var got = fun.toSource();
+}
+test('return let (y) x;');