Adapt streams for additional stackTrace argument.

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

Index: sdk/lib/_internal/pub/lib/src/barback/server.dart
diff --git a/sdk/lib/_internal/pub/lib/src/barback/server.dart b/sdk/lib/_internal/pub/lib/src/barback/server.dart
index 3b8c1542cf4c6d2a9f43d02921f5a67a7e8786ec..e058f6fbdaee63590e13af08e2b99490c763a179 100644
--- a/sdk/lib/_internal/pub/lib/src/barback/server.dart
+++ b/sdk/lib/_internal/pub/lib/src/barback/server.dart
@@ -55,8 +55,8 @@ class BarbackServer {
       : _server = server,
         port = server.port,
         address = server.address {
-    _server.listen(_handleRequest, onError: (error) {
-      _resultsController.addError(error);
+    _server.listen(_handleRequest, onError: (error, stackTrace) {
+      _resultsController.addError(error, stackTrace);
       close();
     });
   }