Provisionally stop working around issues 9252 and 9253.

utils/pub/hosted_source.dart

 // Copyright (c) 2012, 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 hosted_source;
 
 import 'dart:async';
 import 'dart:io' as io;
 import 'dart:json' as json;
 import 'dart:uri';
@@ skipping 64 matching lines @@
       var tempDir = systemCache.createTempDir();
       return httpClient.send(new http.Request("GET", url))
           .then((response) => response.stream)
           .then((stream) {
         return timeout(extractTarGz(stream, tempDir), HTTP_TIMEOUT,
             'fetching URL "$url"');
       }).then((_) {
         // Now that the install has succeeded, move it to the real location in
         // the cache. This ensures that we don't leave half-busted ghost
         // directories in the user's pub cache if an install fails.
-        return renameDir(tempDir, destPath);
-      }).then((_) => true);
+        renameDir(tempDir, destPath);
+        return true;
+      });
     });
   }
 
   /// The system cache directory for the hosted source contains subdirectories
   /// for each separate repository URL that's used on the system. Each of these
   /// subdirectories then contains a subdirectory for each package installed
   /// from that site.
   Future<String> systemCacheDirectory(PackageId id) {
     var parsed = _parseDescription(id.description);
     var url = _getSourceDirectory(parsed.last);
@@ skipping 107 matching lines @@
   }
 
   var name = description["name"];
   if (name is! String) {
     throw new FormatException("The 'name' key must have a string value.");
   }
 
   var url = description.containsKey("url") ? description["url"] : _defaultUrl;
   return new Pair<String, String>(name, url);
 }