Store exceptions with transitive files context into ByteStore.

pkg/analysis_server/lib/src/analysis_server.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;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:core';
 import 'dart:io' as io;
@@ skipping 1850 matching lines @@
                     : SourceKind.LIBRARY;
             sendAnalysisNotificationOutline(
                 analysisServer, path, result.lineInfo, sourceKind, unit);
           });
         }
       }
       // TODO(scheglov) Implement more notifications.
       // IMPLEMENTED
     });
     analysisDriver.exceptions.listen((nd.ExceptionResult result) {
-      AnalysisEngine.instance.logger
-          .logError('Analysis failed: ${result.path}', result.exception);
+      String message = 'Analysis failed: ${result.path}';
+      if (result.contextKey != null) {
+        message += ' context: ${result.contextKey}';
+      }
+      AnalysisEngine.instance.logger.logError(message, result.exception);
     });
     analysisServer.driverMap[folder] = analysisDriver;
     return analysisDriver;
   }
 
   @override
   AnalysisContext addContext(Folder folder, AnalysisOptions options) {
     ContextBuilder builder = createContextBuilder(folder, options);
     AnalysisContext context = builder.buildContext(folder.path);
 
@@ skipping 228 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }