Don't serialize elements of top-level function/constructor/method bodies.

pkg/analyzer/lib/src/summary/summary_sdk.dart

 // Copyright (c) 2015, 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.summary.summary_sdk;
 
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/file_system/file_system.dart' show ResourceProvider;
 import 'package:analyzer/src/context/cache.dart' show CacheEntry;
@@ skipping 30 matching lines @@
     if (result == TYPE_PROVIDER) {
       entry.setValue(result as ResultDescriptor<TypeProvider>, typeProvider,
           TargetedResult.EMPTY_LIST);
       return true;
     }
     return super.compute(entry, result);
   }
 
   @override
   bool hasResultsForSource(Source source) {
-    return source.source != null && source.isInSystemLibrary;
+    return source != null && source.isInSystemLibrary;
   }
 
   void _buildAsyncLibrary() {
     LibraryElement library = resynthesizer.getLibraryElement('dart:async');
     typeProvider.initializeAsync(library);
   }
 
   void _buildCoreLibrary() {
     LibraryElement library = resynthesizer.getLibraryElement('dart:core');
     typeProvider.initializeCore(library);
@@ skipping 342 matching lines @@
    * throw a [StateError] if there is no class with the given name.
    */
   InterfaceType _getType(LibraryElement library, String name) {
     Element element = library.getType(name);
     if (element == null) {
       throw new StateError("No definition of type $name");
     }
     return (element as ClassElement).type;
   }
 }