in dartc, generics in Typedef not working as expected, when extending generic type

compiler/java/com/google/dart/compiler/resolver/ResolveVisitor.java

 // Copyright (c) 2011, 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.
 
 package com.google.dart.compiler.resolver;
 
 import com.google.dart.compiler.ErrorCode;
 import com.google.dart.compiler.ast.DartCatchBlock;
 import com.google.dart.compiler.ast.DartFunction;
 import com.google.dart.compiler.ast.DartFunctionTypeAlias;
@@ skipping 54 matching lines @@
     // The purpose of this to find generic types and make sure they are bound to object.
     DartTypeNode returnNode = node.getReturnTypeNode();
     if (returnNode != null) {
       bindReturnGenerics(returnNode);
     }
     FunctionAliasElement funcAlias = node.getSymbol();
     for (Type type : funcAlias.getTypeParameters()) {
       TypeVariableElement typeVar = (TypeVariableElement) type.getElement();
       getContext().getScope().declareElement(typeVar.getName(), typeVar);
     }
-    for (DartTypeParameter param : node.getTypeParameters()) {
-      param.accept(this);
-    }
     return null;
   }
 
   void bindTypeVariable(TypeVariableElement variable) {
     DartTypeParameter typeParameterNode = (DartTypeParameter) variable.getNode();
     DartTypeNode boundNode = typeParameterNode.getBound();
     Type bound;
     if (boundNode != null) {
       bound = getContext().resolveType(boundNode, true, isFactoryContext(), ResolverErrorCode.NO_SUCH_TYPE);
       boundNode.setType(bound);
@@ skipping 63 matching lines @@
       return null;
     }
     node.setSymbol(element);
     return element;
   }
 
   CoreTypeProvider getTypeProvider() {
     return typeProvider;
   }
 }