diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug634593.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug634593.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,4 @@
+this.__defineGetter__("x3", Function);
+parseInt = x3;
+parseInt.prototype = [];
+for (var z = 0; z < 10; ++z) { new parseInt() }
\ No newline at end of file