Disallow 'await' in object literal shorthand position

src/parsing/preparser.cc

 // Copyright 2011 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.
 
 #include <cmath>
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/conversions-inl.h"
 #include "src/conversions.h"
@@ skipping 385 matching lines @@
 PreParser::Statement PreParser::ParseHoistableDeclaration(
     int pos, ParseFunctionFlags flags, bool* ok) {
   const bool is_generator = flags & ParseFunctionFlags::kIsGenerator;
   const bool is_async = flags & ParseFunctionFlags::kIsAsync;
   DCHECK(!is_generator || !is_async);
 
   bool is_strict_reserved = false;
   Identifier name = ParseIdentifierOrStrictReservedWord(
       &is_strict_reserved, CHECK_OK);
 
-  if (V8_UNLIKELY(is_async_function() && this->IsAwait(name))) {
-    ReportMessageAt(scanner()->location(),
-                    MessageTemplate::kAwaitBindingIdentifier);
-    *ok = false;
-    return Statement::Default();
-  }
-
   ParseFunctionLiteral(name, scanner()->location(),
                        is_strict_reserved ? kFunctionNameIsStrictReserved
                                           : kFunctionNameValidityUnknown,
                        is_generator ? FunctionKind::kGeneratorFunction
                                     : is_async ? FunctionKind::kAsyncFunction
                                                : FunctionKind::kNormalFunction,
                        pos, FunctionLiteral::kDeclaration, language_mode(),
                        CHECK_OK);
   return Statement::FunctionDeclaration();
 }
@@ skipping 732 matching lines @@
   //   async [no LineTerminator here] function BindingIdentifier[Await]
   //       ( FormalParameters[Await] ) { AsyncFunctionBody }
   int pos = position();
   Expect(Token::FUNCTION, CHECK_OK);
   bool is_strict_reserved = false;
   Identifier name;
   FunctionLiteral::FunctionType type = FunctionLiteral::kAnonymousExpression;
 
   if (peek_any_identifier()) {
     type = FunctionLiteral::kNamedExpression;
-    name = ParseIdentifierOrStrictReservedWord(&is_strict_reserved, CHECK_OK);
-    if (this->IsAwait(name)) {
-      ReportMessageAt(scanner()->location(),
-                      MessageTemplate::kAwaitBindingIdentifier);
-      *ok = false;
-      return Expression::Default();
-    }
+    name = ParseIdentifierOrStrictReservedWord(FunctionKind::kAsyncFunction,
+                                               &is_strict_reserved, CHECK_OK);
   }
 
   ParseFunctionLiteral(name, scanner()->location(),
                        is_strict_reserved ? kFunctionNameIsStrictReserved
                                           : kFunctionNameValidityUnknown,
                        FunctionKind::kAsyncFunction, pos, type, language_mode(),
                        CHECK_OK);
   return Expression::Default();
 }
 
@@ skipping 120 matching lines @@
 
   body->Add(PreParserStatement::ExpressionStatement(return_value), zone());
 }
 
 #undef CHECK_OK
 #undef CHECK_OK_CUSTOM
 
 
 }  // namespace internal
 }  // namespace v8