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

src/preparser.h

 // Copyright 2012 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.
 
 #ifndef V8_PREPARSER_H
 #define V8_PREPARSER_H
 
 #include "src/v8.h"
 
 #include "src/bailout-reason.h"
@@ skipping 863 matching lines @@
       ExpressionClassifier* classifier, bool* ok);
   ExpressionT ParseStrongSuperCallExpression(ExpressionClassifier* classifier,
                                              bool* ok);
 
   void ParseFormalParameter(FormalParameterScopeT* scope, bool is_rest,
                             ExpressionClassifier* classifier, bool* ok);
   int ParseFormalParameterList(FormalParameterScopeT* scope, bool* has_rest,
                                ExpressionClassifier* classifier, bool* ok);
   void CheckArityRestrictions(
       int param_count, FunctionLiteral::ArityRestriction arity_restriction,
-      int formals_start_pos, int formals_end_pos, bool* ok);
+      bool has_rest, int formals_start_pos, int formals_end_pos, bool* ok);
 
   // Checks if the expression is a valid reference expression (e.g., on the
   // left-hand side of assignments). Although ruled out by ECMA as early errors,
   // we allow calls for web compatibility and rewrite them to a runtime throw.
   ExpressionT CheckAndRewriteReferenceExpression(
       ExpressionT expression,
       Scanner::Location location, const char* message, bool* ok);
 
   // Used to validate property names in object literals and class literals
   enum PropertyKind {
@@ skipping 2721 matching lines @@
     }
   }
 
   return parameter_count;
 }
 
 
 template <class Traits>
 void ParserBase<Traits>::CheckArityRestrictions(
     int param_count, FunctionLiteral::ArityRestriction arity_restriction,
-    int formals_start_pos, int formals_end_pos, bool* ok) {
+    bool has_rest, int formals_start_pos, int formals_end_pos, bool* ok) {
   switch (arity_restriction) {
     case FunctionLiteral::GETTER_ARITY:
       if (param_count != 0) {
         ReportMessageAt(Scanner::Location(formals_start_pos, formals_end_pos),
                         "bad_getter_arity");
         *ok = false;
       }
       break;
     case FunctionLiteral::SETTER_ARITY:
       if (param_count != 1) {
         ReportMessageAt(Scanner::Location(formals_start_pos, formals_end_pos),
                         "bad_setter_arity");
         *ok = false;
       }
+      if (has_rest) {
+        ReportMessageAt(Scanner::Location(formals_start_pos, formals_end_pos),
+                        "setter_rest_param");
+        *ok = false;
+      }
       break;
     default:
       break;
   }
 }
 
 
 template <class Traits>
 typename ParserBase<Traits>::ExpressionT
 ParserBase<Traits>::ParseArrowFunctionLiteral(
@@ skipping 272 matching lines @@
       *ok = false;
       return;
     }
     has_seen_constructor_ = true;
     return;
   }
 }
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H