Improve barback/pub logging.

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

Index: sdk/lib/_internal/pub/lib/src/dart.dart
diff --git a/sdk/lib/_internal/pub/lib/src/dart.dart b/sdk/lib/_internal/pub/lib/src/dart.dart
index 4c746d1e88faa4372cbdf3d162db15e2f8e2a9a0..e9db32fa7b1a18eadd2cbe4d5409b1cb257fbbf2 100644
--- a/sdk/lib/_internal/pub/lib/src/dart.dart
+++ b/sdk/lib/_internal/pub/lib/src/dart.dart
@@ -58,9 +58,6 @@ Future<String> compile(String entrypoint, {String packageRoot,
         path.toUri(appendSlash(_libPath)),
         path.toUri(appendSlash(packageRoot)),
         inputProvider, diagnosticHandler, options);
-  }).then((result) {
-    if (result != null) return result;
-    throw new ApplicationException('Failed to compile "$entrypoint".');

[nweiz, 2013/10/16 19:41:27]

I really don't like getting rid of this. It makes this much less intuitive as a
library function, and it would be perfectly reasonable to just catch this error
in the dart2js transformer.

[Bob Nystrom, 2013/10/28 23:45:56]

Done.

   });
 }