From 7b9bcd6a93822567206f0fb2f4fc52b9f1572983 Mon Sep 17 00:00:00 2001
From: Jacob MacDonald <jakemac@google.com>
Date: Wed, 18 Mar 2020 09:46:01 -0700
Subject: [PATCH] update StreamSinkTransformer.fromHandlers error handler to
 have a non-nullable stack trace

---
 lib/src/stream_sink_transformer.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/src/stream_sink_transformer.dart b/lib/src/stream_sink_transformer.dart
index 1ac5073..bdcb196 100644
--- a/lib/src/stream_sink_transformer.dart
+++ b/lib/src/stream_sink_transformer.dart
@@ -35,7 +35,7 @@ abstract class StreamSinkTransformer<S, T> {
   /// the event is passed through unaltered.
   factory StreamSinkTransformer.fromHandlers(
       {void Function(S, EventSink<T>)? handleData,
-      void Function(Object, StackTrace?, EventSink<T>)? handleError,
+      void Function(Object, StackTrace, EventSink<T>)? handleError,
       void Function(EventSink<T>)? handleDone}) {
     return HandlerTransformer<S, T>(handleData, handleError, handleDone);
   }