Make exception reporting best effort.

pkg/analyzer_cli/lib/src/driver.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.
 
 import 'dart:async';
 import 'dart:io' as io;
 
 import 'package:analyzer/error/error.dart';
 import 'package:analyzer/file_system/file_system.dart' as file_system;
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 207 matching lines @@
     // Wait a brief time for any analytics calls to finish.
     await analytics.waitForLastPing(timeout: new Duration(milliseconds: 200));
     analytics.close();
   }
 
   Future<ErrorSeverity> _analyzeAll(CommandLineOptions options) async {
     PerformanceTag previous = _analyzeAllTag.makeCurrent();
     try {
       return await _analyzeAllImpl(options);
     } catch (e, st) {
-      crashReportSender.sendReport(e, stackTrace: st);
+      // Catch and ignore any exceptions when reporting exceptions (network
+      // errors or other).
+      crashReportSender.sendReport(e, stackTrace: st).catchError((_) {});
       rethrow;
     } finally {
       previous.makeCurrent();
     }
   }
 
   /// Perform analysis according to the given [options].
   Future<ErrorSeverity> _analyzeAllImpl(CommandLineOptions options) async {
     if (!options.machineFormat) {
       List<String> fileNames = options.sourceFiles.map((String file) {
@@ skipping 766 matching lines @@
     for (var package in packages) {
       var packageName = path.basename(package.path);
       var realPath = package.resolveSymbolicLinksSync();
       result[packageName] = [
         PhysicalResourceProvider.INSTANCE.getFolder(realPath)
       ];
     }
     return result;
   }
 }