Tighten check disallowing use of initializing formals (fixes #26855).

runtime/vm/parser.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "platform/assert.h"
@@ skipping 653 matching lines @@
                                  TokenPosition field_pos);
   AstNode* ParseSuperOperator();
   AstNode* BuildUnarySuperOperator(Token::Kind op, PrimaryNode* super);
 
   static bool ParseFormalParameters(const Function& func, ParamList* params);
 
   void SetupDefaultsForOptionalParams(const ParamList& params);
   ClosureNode* CreateImplicitClosureNode(const Function& func,
                                          TokenPosition token_pos,
                                          AstNode* receiver);
-  static void AddFormalParamsToFunction(const ParamList* params,
-                                        const Function& func);
+  void AddFormalParamsToFunction(const ParamList* params, const Function& func);
   void AddFormalParamsToScope(const ParamList* params, LocalScope* scope);
 
   SequenceNode* ParseConstructor(const Function& func);
   SequenceNode* ParseFunc(const Function& func, bool check_semicolon);
 
   void ParseNativeFunctionBlock(const ParamList* params, const Function& func);
 
   SequenceNode* ParseInstanceGetter(const Function& func);
   SequenceNode* ParseInstanceSetter(const Function& func);
   SequenceNode* ParseStaticFinalGetter(const Function& func);
@@ skipping 352 matching lines @@
 
   intptr_t recursion_counter_;
   friend class RecursionChecker;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_