Error Suppression FTW.

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 747 matching lines @@
   }
 
   @override
   CompilationUnitElement getCompilationUnitElement(
       Source unitSource, Source librarySource) {
     AnalysisTarget target = new LibrarySpecificUnit(librarySource, unitSource);
     return getResult(target, COMPILATION_UNIT_ELEMENT);
   }
 
   @override
-  Object getConfigurationData(ResultDescriptor key) => _configurationData[key];
+  Object getConfigurationData(ResultDescriptor key) =>
+      _configurationData[key] ?? key?.defaultValue;
 
   @override
   TimestampedData<String> getContents(Source source) {
     String contents = _contentCache.getContents(source);
     if (contents != null) {
       return new TimestampedData<String>(
           _contentCache.getModificationStamp(source), contents);
     }
     return source.contents;
   }
@@ skipping 238 matching lines @@
       }
     }
     if (notify && changed) {
       _onSourcesChangedController
           .add(new SourcesChangedEvent.changedContent(source, newContents));
     }
     return changed;
   }
 
   /**
-   * Invalidate analysis cache.
+   * Invalidate analysis cache and notify work managers that they have work
+   * to do.
    */
   void invalidateCachedResults() {
     _cache = createCacheFromSourceFactory(_sourceFactory);
+    for (WorkManager workManager in workManagers) {
+      workManager.onAnalysisOptionsChanged();
+    }
   }
 
   @override
   void invalidateLibraryHints(Source librarySource) {
     List<Source> sources = getResult(librarySource, UNITS);
     if (sources != null) {
       for (Source source in sources) {
         getCacheEntry(source).setState(HINTS, CacheState.INVALID);
       }
     }
@@ skipping 1088 matching lines @@
     DartSdk sdk = factory.dartSdk;
     if (sdk == null) {
       throw new IllegalArgumentException(
           "The source factory for an SDK analysis context must have a DartUriResolver");
     }
     return new AnalysisCache(<CachePartition>[
       AnalysisEngine.instance.partitionManager_new.forSdk(sdk)
     ]);
   }
 }