Reset AnalysisDriver after changes.

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/instrumentation/instrumentation.dart';
@@ skipping 1713 matching lines @@
     if (newOrder.length < count) {
       analysisPriorityOrder = newOrder;
     }
   }
 
   /**
    * Create an entry for the newly added [source] and invalidate any sources
    * that referenced the source before it existed.
    */
   void _sourceAvailable(Source source) {
+    driver.reset();
     // TODO(brianwilkerson) This method needs to check whether the source was
     // previously being implicitly analyzed. If so, the cache entry needs to be
     // update to reflect the new status and an event needs to be generated to
     // inform clients that it is no longer being implicitly analyzed.
     CacheEntry entry = _cache.get(source);
     if (entry == null) {
       _createCacheEntry(source, true);
     } else {
       entry.modificationTime = getModificationStamp(source);
       entry.setState(CONTENT, CacheState.INVALID);
@@ skipping 56 matching lines @@
 //                  'dartDelta: add=${dartDelta.addedNames} remove=${dartDelta.removedNames}');
               delta = dartDelta;
               entry.setState(CONTENT, CacheState.INVALID, delta: delta);
               return;
             }
           }
         }
       }
       entry.setState(CONTENT, CacheState.INVALID);
     }
+    driver.reset();
     for (WorkManager workManager in workManagers) {
       workManager.applyChange(
           Source.EMPTY_LIST, <Source>[source], Source.EMPTY_LIST);
     }
   }
 
   /**
    * Record that the give [source] has been deleted.
    */
   void _sourceDeleted(Source source) {
@@ skipping 21 matching lines @@
 //          new AnalysisException("This source was marked as being deleted"),
 //          null));
 //    }
     _removeFromPriorityOrder(source);
   }
 
   /**
    * Record that the given [source] has been removed.
    */
   void _sourceRemoved(Source source) {
+    driver.reset();
     _removeFromCache(source);
     _removeFromPriorityOrder(source);
   }
 
   /**
    * TODO(scheglov) A hackish, limited incremental resolution implementation.
    */
   bool _tryPoorMansIncrementalResolution(Source unitSource, String newCode) {
     return PerformanceStatistics.incrementalAnalysis.makeCurrentWhile(() {
       incrementalResolutionValidation_lastUnitSource = null;
@@ skipping 245 matching lines @@
     });
     if (!pendingFuture.evaluate(entry)) {
       _context._pendingFutureTargets
           .putIfAbsent(_target, () => <PendingFuture>[])
           .add(pendingFuture);
       _context.dartWorkManager.addPriorityResult(_target, _descriptor);
     }
     return pendingFuture.future;
   }
 }