[parser] report SyntaxError if rest parameter used in Setter MethodDefinition

test/message/rest-param-object-setter-strict.js

Index: test/message/rest-param-object-setter-strict.js
diff --git a/test/message/formal-parameters-bad-rest.js b/test/message/rest-param-object-setter-strict.js
similarity index 62%
copy from test/message/formal-parameters-bad-rest.js
copy to test/message/rest-param-object-setter-strict.js
index c67e1de93fed808fb0578e9029dabef201ab51e4..e3a8f604e64ae75b5941c878c34280f352af7d00 100644
--- a/test/message/formal-parameters-bad-rest.js
+++ b/test/message/rest-param-object-setter-strict.js
@@ -3,5 +3,10 @@
 // found in the LICENSE file.
 //
 // Flags: --harmony-rest-parameters
+'use strict';
 
-function foo(...b, a) { return a }
+var _bad = "this should fail!";
+({
+  get bad() { return _bad; },
+  set bad(...args) { _bad = args[0]; }
+});