Issue 23271. Check target.staticElement for null.

pkg/analysis_server/lib/src/services/correction/fix_internal.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 analysis_server.src.services.correction.fix_internal;
 
 import 'dart:collection';
 
 import 'package:analysis_server/edit/fix/fix_core.dart';
 import 'package:analysis_server/edit/fix/fix_dart.dart';
@@ skipping 703 matching lines @@
       // prepare target interface type
       DartType targetType = target.bestType;
       if (targetType is! InterfaceType) {
         return;
       }
       targetClassElement = targetType.element;
       // maybe static
       if (target is Identifier) {
         Identifier targetIdentifier = target;
         Element targetElement = targetIdentifier.staticElement;
+        if (targetElement == null) {
+          return;

[Brian Wilkerson, 2015/04/22 20:55:55]

Given that we don't expect this case, and think that it might indicate some
other bug, should we log some information about it (like the node types up to
the root of the AST)? Or would that just be noise?

+        }
         staticModifier = targetElement.kind == ElementKind.CLASS;
       }
     } else {
       targetClassElement = getEnclosingClassElement(node);
       if (targetClassElement == null) {
         return;
       }
       staticModifier = _inStaticContext();
     }
     utils.targetClassElement = targetClassElement;
@@ skipping 445 matching lines @@
     _addInsertEdit(offset, importSource, libraryUnitElement);
     // add proposal
     _addFix(kind, [importPath]);
   }
 
   void _addFix_importLibrary_withElement(String name, ElementKind kind) {
     // ignore if private
     if (name.startsWith('_')) {
       return;
     }
-
     // may be there is an existing import,
     // but it is with prefix and we don't use this prefix
     for (ImportElement imp in unitLibraryElement.imports) {
       // prepare element
       LibraryElement libraryElement = imp.importedLibrary;
       Element element = getExportedElement(libraryElement, name);
       if (element == null) {
         continue;
       }
       if (element is PropertyAccessorElement) {
@@ skipping 1302 matching lines @@
 /**
  * Describes the location for a newly created [FieldDeclaration].
  */
 class _FieldLocation {
   final String prefix;
   final int offset;
   final String suffix;
 
   _FieldLocation(this.prefix, this.offset, this.suffix);
 }