Adapt streams for additional stackTrace argument.

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

Index: sdk/lib/_internal/pub/lib/src/command/serve.dart
diff --git a/sdk/lib/_internal/pub/lib/src/command/serve.dart b/sdk/lib/_internal/pub/lib/src/command/serve.dart
index bc6f0188f06c193902b53fb82c0e58f04375a8fb..b24de466e303f6c877395271ec6443d7b264f3db 100644
--- a/sdk/lib/_internal/pub/lib/src/command/serve.dart
+++ b/sdk/lib/_internal/pub/lib/src/command/serve.dart
@@ -91,8 +91,8 @@ class ServeCommand extends PubCommand {
           log.message("Build completed with "
               "${_red}${result.errors.length}$_none errors.");
         }
-      }, onError: (error) {
-        if (!completer.isCompleted) completer.completeError(error);
+      }, onError: (error, [stackTrace]) {
+        if (!completer.isCompleted) completer.completeError(error, stackTrace);
       });
 
       server.results.listen((result) {
@@ -109,8 +109,8 @@ class ServeCommand extends PubCommand {
         } else {
           log.message("$msg $error");
         }
-      }, onError: (error) {
-        if (!completer.isCompleted) completer.completeError(error);
+      }, onError: (error, [stackTrace]) {
+        if (!completer.isCompleted) completer.completeError(error, stackTrace);
       });
 
       log.message("Serving ${entrypoint.root.name} "