diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-476088.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-476088.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+// |reftest| require-or(debugMode,skip)
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+
+var err;
+try {
+    f = function() { var x; x.y; }
+    trap(f, 0, "");
+    f();
+} catch (e) {
+    err = e;
+}
+assertEq(err instanceof TypeError, true);
+assertEq(err.message, "x is undefined")
+
+reportCompare(0, 0, 'ok');
+