Report a fatal error on attempt to rename an element declared in SDK.

pkg/analysis_server/test/services/refactoring/rename_constructor_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 test.services.refactoring.rename_constructor;
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
@@ skipping 37 matching lines @@
     _createConstructorDeclarationRefactoring('test() {}');
     // check status
     refactoring.newName = 'newName';
     RefactoringStatus status = await refactoring.checkFinalConditions();
     assertRefactoringStatus(status, RefactoringProblemSeverity.ERROR,
         expectedMessage:
             "Class 'A' already declares method with name 'newName'.",
         expectedContextSearch: 'newName() {} // existing');
   }
 
+  test_checkInitialConditions_inSDK() async {
+    indexTestUnit('''
+main() {
+  new String.fromCharCodes([]);
+}
+''');
+    createRenameRefactoringAtString('fromCharCodes(');
+    // check status
+    refactoring.newName = 'newName';
+    RefactoringStatus status = await refactoring.checkInitialConditions();
+    assertRefactoringStatus(status, RefactoringProblemSeverity.FATAL,
+        expectedMessage:
+            "The constructor 'String.fromCharCodes' is defined in the SDK, so cannot be renamed.");
+  }
+
   test_checkNewName() {
     indexTestUnit('''
 class A {
   A.test() {}
 }
 ''');
     createRenameRefactoringAtString('test() {}');
     expect(refactoring.oldName, 'test');
     // null
     refactoring.newName = null;
@@ skipping 115 matching lines @@
 }
 ''');
   }
 
   void _createConstructorDeclarationRefactoring(String search) {
     ConstructorElement element = findNodeElementAtString(
         search, (node) => node is ConstructorDeclaration);
     createRenameRefactoringForElement(element);
   }
 }