fix #28141, fix super generic method bounds check

pkg/analyzer/lib/src/dart/element/type.dart

 // Copyright (c) 2014, 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.
 
 library analyzer.src.dart.element.type;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 584 matching lines @@
       return TypeParameterElement.EMPTY_LIST;
     }
     List<TypeParameterElement> baseTypeFormals = element.typeParameters;
     int formalCount = baseTypeFormals.length;
     if (formalCount == 0) {
       return TypeParameterElement.EMPTY_LIST;
     }
 
     // Create type formals with specialized bounds.
     // For example `<U extends T>` where T comes from an outer scope.
-    List<TypeParameterElement> result =
-        new List<TypeParameterElement>(formalCount);
-
-    for (int i = 0; i < formalCount; i++) {
-      result[i] = TypeParameterMember.from(baseTypeFormals[i], this);
-    }
-    return result;
+    return TypeParameterMember.from(baseTypeFormals, this);
   }
 
   @override
   List<TypeParameterElement> get typeParameters {
     if (_typeParameters == null) {
       // Combine the generic type variables from all enclosing contexts, except
       // for this generic function's type variables. Those variables are
       // tracked in [boundTypeParameters].
       _typeParameters = <TypeParameterElement>[];
 
@@ skipping 2175 matching lines @@
 
   @override
   TypeImpl pruned(List<FunctionTypeAliasElement> prune) => this;
 
   @override
   VoidTypeImpl substitute2(
           List<DartType> argumentTypes, List<DartType> parameterTypes,
           [List<FunctionTypeAliasElement> prune]) =>
       this;
 }