Adapt streams for additional stackTrace argument.

pkg/barback/lib/src/utils.dart

Index: pkg/barback/lib/src/utils.dart
diff --git a/pkg/barback/lib/src/utils.dart b/pkg/barback/lib/src/utils.dart
index 95f498e037a634f3c0aac681663b242b57be6882..3d54e87d2a395885c13720dd5b1941f8a4ee3855 100644
--- a/pkg/barback/lib/src/utils.dart
+++ b/pkg/barback/lib/src/utils.dart
@@ -139,9 +139,9 @@ Stream mergeStreams(Iterable<Stream> streams, {bool broadcast: false}) {
   for (var stream in streams) {
     stream.listen((value) {
       controller.add(value);
-    }, onError: (error) {
-      controller.addError(error);
-    }, onDone: () {
+    },

[Lasse Reichstein Nielsen, 2013/10/04 08:45:17]

just "controller.add", no need to eta-expand.

[floitsch, 2013/10/05 18:11:48]

Done.

+    onError: controller.addError,

[Lasse Reichstein Nielsen, 2013/10/04 08:45:17]

Is indentation right here. I'd like it to be indented by at least two.
Maybe:
 stream.listen(
   controller.add,
   onError: controller.addError,
   onDone: () {
     ...  
   }
 );

[floitsch, 2013/10/05 18:11:48]

Done.

+    onDone: () {
       doneCount++;
       if (doneCount == streams.length) controller.close();
     });
@@ -188,10 +188,10 @@ Stream futureStream(Future<Stream> future) {
   future.then((stream) {
     stream.listen(
         controller.add,
-        onError: (error) => controller.addError(error),
+        onError: controller.addError,
         onDone: controller.close);
-  }).catchError((e) {
-    controller.addError(e);
+  }).catchError((e, StackTrace stackTrace) {
+    controller.addError(e, stackTrace);
     controller.close();
   });
   return controller.stream;