Add testcase for bug 476088. r=jruderman

js/src/tests/js1_8_5/regress/jstests.list

@@ -2,6 +2,7 @@ url-prefix ../../jsreftest.html?test=js1_8_5/regress/
 script no-array-comprehension-length-limit.js
 script regress-373843.js
 script regress-383902.js
+require-or(debugMode,skip) script regress-476088.js
 script regress-500528.js
 script regress-533876.js
 script regress-541255-0.js

js/src/tests/js1_8_5/regress/regress-476088.js

@@ -0,0 +1,17 @@
+// 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');
+