From 0c4c5c9d480ad9d7f64084c082dd1a8b403c8377 Mon Sep 17 00:00:00 2001
From: David Brochart <david.brochart@gmail.com>
Date: Thu, 26 Oct 2023 11:18:50 +0200
Subject: [PATCH] Fix possibly not defined tracker

---
 jupyter_client/session.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/jupyter_client/session.py b/jupyter_client/session.py
index 2cc2874e..b308cf40 100644
--- a/jupyter_client/session.py
+++ b/jupyter_client/session.py
@@ -861,6 +861,8 @@ def send(
             # use dummy tracker, which will be done immediately
             tracker = DONE
             stream.send_multipart(to_send, copy=copy)
+        else:
+            tracker = DONE
 
         if self.debug:
             pprint.pprint(msg)  # noqa