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

pkg/analyzer/lib/error/error.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.error.error;
 
 import 'dart:collection';
 
 import 'package:analyzer/error/listener.dart';
 import 'package:analyzer/src/dart/scanner/scanner.dart' show ScannerErrorCode;
@@ skipping 41 matching lines @@
   CheckedModeCompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE,
   CheckedModeCompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
   CompileTimeErrorCode.ACCESS_PRIVATE_ENUM_FIELD,
   CompileTimeErrorCode.AMBIGUOUS_EXPORT,
   CompileTimeErrorCode.ANNOTATION_WITH_NON_CLASS,
   CompileTimeErrorCode.ARGUMENT_DEFINITION_TEST_NON_PARAMETER,
   CompileTimeErrorCode.ASYNC_FOR_IN_WRONG_CONTEXT,
   CompileTimeErrorCode.AWAIT_IN_WRONG_CONTEXT,
+  CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_PREFIX_NAME,
   CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE,
   CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME,
   CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE_NAME,
   CompileTimeErrorCode.BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME,
   CompileTimeErrorCode.CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS,
   CompileTimeErrorCode.CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD,
   CompileTimeErrorCode.CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD,
   CompileTimeErrorCode.CONFLICTING_GETTER_AND_METHOD,
   CompileTimeErrorCode.CONFLICTING_METHOD_AND_GETTER,
   CompileTimeErrorCode.CONFLICTING_TYPE_VARIABLE_AND_CLASS,
@@ skipping 753 matching lines @@
    * a single list of errors.
    */
   static List<AnalysisError> mergeLists(List<List<AnalysisError>> errorLists) {
     Set<AnalysisError> errors = new HashSet<AnalysisError>();
     for (List<AnalysisError> errorList in errorLists) {
       errors.addAll(errorList);
     }
     return errors.toList();
   }
 }