diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/Global/bug660612.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/Global/bug660612.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+try {
+    decodeURIComponent('%ED%A0%80');
+    assertEq(true, false, "expected an URIError");
+} catch (e) {
+  assertEq(e instanceof URIError, true);
+  reportCompare(true,true);
+}