Commit Martin's patch for pub + lib_v2.

utils/pub/hosted_source.dart

Index: utils/pub/hosted_source.dart
diff --git a/utils/pub/hosted_source.dart b/utils/pub/hosted_source.dart
index 45867e5f924316a02b9d17e9460572780400f5b5..43922a21aae3287698e9f5f1fbe9737159b927a7 100644
--- a/utils/pub/hosted_source.dart
+++ b/utils/pub/hosted_source.dart
@@ -41,7 +41,7 @@ class HostedSource extends Source {
       return doc['versions']
           .mappedBy((version) => new Version.parse(version))
           .toList();
-    }).transformException((ex) {
+    }).catchError((ex) {
       _throwFriendlyError(ex, parsed.first, parsed.last);
     });
   }
@@ -55,7 +55,7 @@ class HostedSource extends Source {
 
     return httpClient.read(fullUrl).then((yaml) {
       return new Pubspec.parse(yaml, systemCache.sources);
-    }).transformException((ex) {
+    }).catchError((ex) {
       _throwFriendlyError(ex, id, parsed.last);
     });
   }