Close receive_stream after task group has exited.

fleming79 · fleming79 · commit 555f4b2d61bf · 2025-04-02T12:40:45.000+11:00
diff --git a/ipykernel/kernelbase.py b/ipykernel/kernelbase.py
@@ -452,6 +452,7 @@ async def shell_main(self, subshell_id: str | None):
             self._send_exec_request.pop(socket, None)
             self.set_trait("asyncio_event_loop", None)
             await send_stream.aclose()
+            await receive_stream.aclose()
 
     async def _execute_request_handler(self, receive_stream: MemoryObjectReceiveStream):
         async with receive_stream:
