Issue 25733. Built-in itentifiers are not permitted as prefixes.

pkg/analyzer/test/generated/non_error_resolver_test.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.test.generated.non_error_resolver_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/standard_resolution_map.dart';
@@ skipping 2177 matching lines @@
 }
 class B {
   var v;
   B() : v = new A.named();
 }''');
     await computeAnalysisResult(source);
     assertNoErrors(source);
     verify([source]);
   }
 
-  test_implicitThisReferenceInInitializer_importPrefix() async {
-    Source source = addSource(r'''
-import 'dart:async' as abstract;
-class A {
-  var v = new abstract.Completer();
-}''');
-    await computeAnalysisResult(source);
-    assertNoErrors(source);
-    verify([source]);
-  }
-
   test_implicitThisReferenceInInitializer_prefixedIdentifier() async {
     Source source = addSource(r'''
 class A {
   var f;
 }
 class B {
   var v;
   B(A a) : v = a.f;
 }''');
     await computeAnalysisResult(source);
@@ skipping 4039 matching lines @@
     await computeAnalysisResult(source);
     assertNoErrors(source);
     verify([source]);
     reset();
   }
 
   Future<Null> _check_wrongNumberOfParametersForOperator1(String name) async {
     await _check_wrongNumberOfParametersForOperator(name, "a");
   }
 }