From a6128b8f8f5d917912dfddf53cf7cf2ed7602352 Mon Sep 17 00:00:00 2001
From: Terrance <git@terrance.allofti.me>
Date: Mon, 23 Apr 2018 07:58:26 +0100
Subject: [PATCH] Cancel background tasks on disconnect

Fixes #782.
---
 telethon/telegram_bare_client.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/telethon/telegram_bare_client.py b/telethon/telegram_bare_client.py
index 9192d4df..65f7dc88 100644
--- a/telethon/telegram_bare_client.py
+++ b/telethon/telegram_bare_client.py
@@ -253,6 +253,15 @@ class TelegramBareClient:
         __log__.info('Disconnecting...')
         self._user_connected = False
         self._sender.disconnect()
+        if self._recv_loop:
+            self._recv_loop.cancel()
+            self._recv_loop = None
+        if self._ping_loop:
+            self._ping_loop.cancel()
+            self._ping_loop = None
+        if self._state_loop:
+            self._state_loop.cancel()
+            self._state_loop = None
         # TODO Shall we clear the _exported_sessions, or may be reused?
         self._first_request = True  # On reconnect it will be first again
         self.session.close()