diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug830049.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug830049.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// |jit-test| error: InternalError
+
+p = Proxy.create({
+  has: function() function r() s += ''
+})
+Object.prototype.__proto__ = p
+function TestCase(n) {
+    this.name = n
+}
+new TestCase()