Run the materialized literal reindexer on default parameter initializers

test/mjsunit/regress/regress-554865.js

Index: test/mjsunit/regress/regress-554865.js
diff --git a/test/message/regress/regress-3995.js b/test/mjsunit/regress/regress-554865.js
similarity index 65%
copy from test/message/regress/regress-3995.js
copy to test/mjsunit/regress/regress-554865.js
index ba84bc096527cc242b9ad43983b42eec0462c43c..9b66d79b35f23000dd7f5dcbf4aa2f11fda41163 100644
--- a/test/message/regress/regress-3995.js
+++ b/test/mjsunit/regress/regress-554865.js
@@ -1,7 +1,10 @@
 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+//
+// Flags: --harmony-default-parameters
 
 (function() {
-  throw new Error("boom");
+  var x = {};
+  ((y = [42]) => assertEquals(42, y[0]))();
 })();