Properly close the Linux directory watcher when listing a subdirectory fails.

pkg/watcher/lib/src/directory_watcher/linux.dart

 // Copyright (c) 2013, 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 watcher.directory_watcher.linux;
 
 import 'dart:async';
 import 'dart:io';
 
 import '../utils.dart';
@@ skipping 148 matching lines @@
       if (!isReady || _eventsController.isClosed) return;
       _listen(new Directory(path).list(recursive: true), (entry) {
         if (entry is Directory) return;
         _eventsController.add(new WatchEvent(ChangeType.ADD, entry.path));
       }, onError: (error, stackTrace) {
         // Ignore an exception caused by the dir not existing. It's fine if it
         // was added and then quickly removed.
         if (error is FileSystemException) return;
 
         _eventsController.addError(error, stackTrace);
-        _eventsController.close();
+        close();
       }, cancelOnError: true);
     });
   }
 
   /// The callback that's run when a batch of changes comes in.
   void _onBatch(List<FileSystemEvent> batch) {
     var changedEntries = new Set<String>();
     var oldEntries = new Map.from(_entries);
 
     // inotify event batches are ordered by occurrence, so we treat them as a
@@ skipping 106 matching lines @@
   static const DIRECTORY = const _EntryState._("directory");
 
   const _EntryState._(this._name);
 
   /// Returns [DIRECTORY] if [isDir] is true, and [FILE] otherwise.
   factory _EntryState(bool isDir) =>
       isDir ? _EntryState.DIRECTORY : _EntryState.FILE;
 
   String toString() => _name;
 }