From d94f2ed65b15e84b47b308e233e6928fc601953e Mon Sep 17 00:00:00 2001
From: Serhii Dylda <tunerzinc@gmail.com>
Date: Tue, 3 Nov 2020 17:12:56 +0100
Subject: [PATCH] Fix unhandled ValueError inside _dispatch_update()

---
 telethon/client/updates.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/telethon/client/updates.py b/telethon/client/updates.py
index 4a9c2d4b..2c2b2836 100644
--- a/telethon/client/updates.py
+++ b/telethon/client/updates.py
@@ -397,6 +397,11 @@ class UpdateMethods:
                     # the channel. Because these "happen sporadically" (#1428)
                     # we should be okay (no flood waits) even if more occur.
                     pass
+                except ValueError:
+                    # There is a chance that GetFullChannelRequest and GetDifferenceRequest
+                    # inside the _get_difference() function will end up with 
+                    # ValueError("Request was unsuccessful N time(s)") for whatever reasons.
+                    pass
 
         if not self._self_input_peer:
             # Some updates require our own ID, so we must make sure