Add missing trace finish on an uncommon code path
diff --git a/stream.go b/stream.go
index 3ac5f6a..d8bdc16 100644
--- a/stream.go
+++ b/stream.go
@@ -138,7 +138,9 @@
 		case <-t.Error():
 			// Incur transport error, simply exit.
 		case <-s.Context().Done():
-			cs.closeTransportStream(transport.ContextErr(s.Context().Err()))
+			err := s.Context().Err()
+			cs.finish(err)
+			cs.closeTransportStream(transport.ContextErr(err))
 		}
 	}()
 	return cs, nil