Find right scope associated with prologue

test/mjsunit/harmony/regress/regress-513474.js

Index: test/mjsunit/harmony/regress/regress-513474.js
diff --git a/test/message/formal-parameters-bad-rest.js b/test/mjsunit/harmony/regress/regress-513474.js
similarity index 80%
copy from test/message/formal-parameters-bad-rest.js
copy to test/mjsunit/harmony/regress/regress-513474.js
index c67e1de93fed808fb0578e9029dabef201ab51e4..ec4bc84a30e25dc31e75194e8f351dea62cdab2c 100644
--- a/test/message/formal-parameters-bad-rest.js
+++ b/test/mjsunit/harmony/regress/regress-513474.js
@@ -1,7 +1,7 @@
 // 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-rest-parameters
 
-function foo(...b, a) { return a }
+(function(...a) { function f() { eval() } })();