Make sure the socket unsubscribes on error, so we don't get race conditions between an error and an…

runtime/bin/socket_patch.dart

Index: runtime/bin/socket_patch.dart
diff --git a/runtime/bin/socket_patch.dart b/runtime/bin/socket_patch.dart
index 90cdb56464b9f6b12dafe704b7209d6dc0471c85..3f7362858ba49241c8432f76e3cbc830ec0b0c32 100644
--- a/runtime/bin/socket_patch.dart
+++ b/runtime/bin/socket_patch.dart
@@ -659,19 +659,21 @@ class _SocketStreamConsumer extends StreamConsumer<List<int>, Socket> {
 
   Future<Socket> consume(Stream<List<int>> stream) {
     if (socket._raw != null) {
-      subscription = stream.listen((data) {
-        assert(!paused);
-        assert(buffer == null);
-        buffer = data;
-        offset = 0;
-        write();
-      },
-      onError: (error) {
-        socket._consumerDone(error);
-      },
-      onDone: () {
-        socket._consumerDone();
-      });
+      subscription = stream.listen(
+          (data) {
+            assert(!paused);
+            assert(buffer == null);
+            buffer = data;
+            offset = 0;
+            write();
+          },
+          onError: (error) {
+            socket._consumerDone(error);
+          },
+          onDone: () {
+            socket._consumerDone();
+          },
+          unsubscribeOnError: true);
     }
     return socket._doneFuture;
   }