Properly disallow 'yield' in class expressions and arrow parameters

test/message/yield-in-generator-param.js

Index: test/message/yield-in-generator-param.js
diff --git a/test/message/arrow-param-after-rest.js b/test/message/yield-in-generator-param.js
similarity index 86%
copy from test/message/arrow-param-after-rest.js
copy to test/message/yield-in-generator-param.js
index 9192bc6c0cb45d36acf68165a0ce3fe20e83621b..1a8f8420f6a2c8b8336c3bfd502e49afb30bef4a 100644
--- a/test/message/arrow-param-after-rest.js
+++ b/test/message/yield-in-generator-param.js
@@ -1,7 +1,5 @@
 // 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.
-//
-//
 
-(...x, y) => 10
+function* g(a = yield) {}