Set CacheEntry.target in the contructor.

pkg/analyzer/lib/src/context/context.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.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/src/cancelable_future.dart';
@@ skipping 683 matching lines @@
 //    } on _ElementByIdFinderException {
 //      return finder.result;
 //    }
 //    return null;
   }
 
   @override
   cache.CacheEntry getCacheEntry(AnalysisTarget target) {
     cache.CacheEntry entry = _cache.get(target);
     if (entry == null) {
-      entry = new cache.CacheEntry();
-      _cache.put(target, entry);
+      entry = new cache.CacheEntry(target);
+      _cache.put(entry);
     }
     return entry;
   }
 
   @override
   CompilationUnitElement getCompilationUnitElement(
       Source unitSource, Source librarySource) {
     AnalysisTarget target = new LibrarySpecificUnit(librarySource, unitSource);
     return _getResult(target, COMPILATION_UNIT_ELEMENT);
   }
@@ skipping 707 matching lines @@
     String originalContents = _contentCache.setContents(source, contents);
     handleContentsChanged(source, originalContents, contents, notify);
   }
 
   /**
    * Create a cache entry for the given [source]. The source was explicitly
    * added to this context if [explicitlyAdded] is `true`. Return the cache
    * entry that was created.
    */
   cache.CacheEntry _createCacheEntry(Source source, bool explicitlyAdded) {
-    cache.CacheEntry entry = new cache.CacheEntry();
+    cache.CacheEntry entry = new cache.CacheEntry(source);
     entry.modificationTime = getModificationStamp(source);
     entry.explicitlyAdded = explicitlyAdded;
-    _cache.put(source, entry);
+    _cache.put(entry);
     return entry;
   }
 
   /**
    * Return a list containing all of the change notices that are waiting to be
    * returned. If there are no notices, then return either `null` or an empty
    * list, depending on the value of [nullIfEmpty].
    */
   List<ChangeNotice> _getChangeNotices(bool nullIfEmpty) {
     if (_pendingNotices.isEmpty) {
@@ skipping 675 matching lines @@
     PendingFuture pendingFuture =
         new PendingFuture<T>(_context, target, computeValue);
     if (!pendingFuture.evaluate(entry)) {
       _context._pendingFutureTargets
           .putIfAbsent(target, () => <PendingFuture>[])
           .add(pendingFuture);
     }
     return pendingFuture.future;
   }
 }