diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug829821.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug829821.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// |jit-test| error:TypeError
+
+x = [];
+x.unshift(Uint8ClampedArray);
+x.forEach(Array.prototype.push.bind(new Uint8ClampedArray))