Throw syntax error when a getter/setter has the wrong number of params

test/webkit/for-in-cached.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 // 1.  Redistributions of source code must retain the above copyright
 //     notice, this list of conditions and the following disclaimer.
 // 2.  Redistributions in binary form must reproduce the above copyright
 //     notice, this list of conditions and the following disclaimer in the
@@ skipping 66 matching lines @@
 shouldBe("forIn4(objectWithArrayAsProto)", "[]");
 objectWithArrayAsProto.__proto__[0]=1;
 shouldBe("forIn4(objectWithArrayAsProto)", "['0']");
 
 function forIn5(o) {
     for (var i in o)
         return [i, o[i]];
 }
 
 shouldBe("forIn5({get foo() { return 'called getter'} })", "['foo', 'called getter']");
-shouldBe("forIn5({set foo() { } })", "['foo', undefined]");
-shouldBe("forIn5({get foo() { return 'called getter'}, set foo() { }})", "['foo', 'called getter']");
+shouldBe("forIn5({set foo(v) { } })", "['foo', undefined]");
+shouldBe("forIn5({get foo() { return 'called getter'}, set foo(v) { }})", "['foo', 'called getter']");
 
 function cacheClearing() {
     for(var j=0; j < 10; j++){
         var o = {a:1,b:2,c:3,d:4,e:5}
         try {for (i in o) { delete o.a; o = null; throw "" };}finally{continue}
     }
 }
 
 cacheClearing()