diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug830049.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug830049.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// |jit-test| error:InternalError
+
+// Binary: cache/js-dbg-64-1761f4a9081c-linux
+// Flags: --ion-eager
+//
+
+p = Proxy.create({
+  has: function() function r() s += ''
+})
+Object.prototype.__proto__ = p
+function TestCase(n) {
+    this.name = n
+}
+new TestCase()