Fix an error-swallowing bug in pub and several bugs it was hiding.

sdk/lib/_internal/pub/lib/src/package_graph.dart

Index: sdk/lib/_internal/pub/lib/src/package_graph.dart
diff --git a/sdk/lib/_internal/pub/lib/src/package_graph.dart b/sdk/lib/_internal/pub/lib/src/package_graph.dart
index a66872bb1474486797092fb24c9ef9358cf2f2ce..02ba973bd1b4deeb6f51b06b6ce44b139c07b8bb 100644
--- a/sdk/lib/_internal/pub/lib/src/package_graph.dart
+++ b/sdk/lib/_internal/pub/lib/src/package_graph.dart
@@ -109,7 +109,7 @@ class PackageGraph {
     if (id == null) return false;
 
     var source = entrypoint.cache.sources[id.source];
-    if (source is! CachedSource) return true;
+    if (source is! CachedSource) return false;

[Bob Nystrom, 2014/09/24 17:19:37]

I didn't do a good code review job. :(

 
     return packages[package].pubspec.transformers.isEmpty;
   }