Example bot from the documentation does not work

[Mario Vilas]

Code that causes the issue

#!/usr/bin/python3
from telethon import TelegramClient, events, sync

# These example values won't work. You must get your own api_id and
# api_hash from https://my.telegram.org, under API Development.
api_id = 0.    # obviously I have real values here
api_hash = ''

client = TelegramClient('session_name', api_id, api_hash)
client.start()
print(client.get_me().stringify())

client.send_message('this_is_a_real_username', 'Hello! Talking to you from Telethon')
client.send_file('this_is_a_real_username', '/home/user/caca.jpg')

client.download_profile_photo('me')
messages = client.get_messages('this_is_a_real_username')
messages[0].download_media()

@client.on(events.NewMessage(pattern='(?i)hi|hello'))
async def handler(event):
    await event.respond('Hey!')

Expected behavior

The bot should do something instead of crashing.

Actual behavior

The bot crashes.

Traceback

marito@Marios-MacBook-Air cacabot % python3 cacabot.py                        
Request caused struct.error: 'i' format requires -2147483648 <= number <= 2147483647: InvokeWithLayerRequest(layer=178, query=InitConnectionRequest(api_id=6857619493, device_model='arm64', system_version='23.4.0', app_version='1.35.0', system_lang_code='en', lang_pack='', lang_code='en', query=GetConfigRequest(), proxy=None, params=None))
Traceback (most recent call last):
  File "/Users/marito/Work/cacabot/cacabot.py", line 10, in <module>
    client.start()
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/client/auth.py", line 128, in start
    else self.loop.run_until_complete(coro)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/asyncio/base_events.py", line 685, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/client/auth.py", line 135, in _start
    await self.connect()
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/client/telegrambaseclient.py", line 596, in connect
    await self._sender.send(functions.InvokeWithLayerRequest(LAYER, req))
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/mtprotosender.py", line 183, in send
    state = RequestState(request)
            ^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/requeststate.py", line 17, in __init__
    self.data = bytes(request)
                ^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/tl/tlobject.py", line 194, in __bytes__
    return self._bytes()
           ^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/tl/functions/__init__.py", line 285, in _bytes
    self.query._bytes(),
    ^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/tl/functions/__init__.py", line 127, in _bytes
    struct.pack('<i', self.api_id),
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
struct.error: 'i' format requires -2147483648 <= number <= 2147483647
Task was destroyed but it is pending!
task: <Task pending name='Task-4' coro=<MTProtoSender._send_loop() running at /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/mtprotosender.py:464> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-5' coro=<MTProtoSender._recv_loop() running at /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/mtprotosender.py:507> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-2' coro=<Connection._send_loop() running at /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/connection/connection.py:316> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Task was destroyed but it is pending!
task: <Task pending name='Task-3' coro=<Connection._recv_loop() running at /Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/site-packages/telethon/network/connection/connection.py:335> wait_for=<Future pending cb=[Task.task_wakeup()]>>
Exception ignored in: <coroutine object Connection._recv_loop at 0x1034efae0>
RuntimeError: coroutine ignored GeneratorExit
marito@Marios-MacBook-Air cacabot % 

Telethon version

1.35.0

Python version

3.12.2

Operating system (including distribution name and version)

Mac OS X Sonoma 14.4.1

Other details

It's a desktop. The network is fine.

Checklist

• The error is in the library's code, and not in my own.
• I have searched for this issue before posting it and there isn't an open duplicate.
• I ran pip install -U https://github.com/LonamiWebs/Telethon/archive/v1.zip and triggered the bug in the latest version.

[Mario Vilas]

I should also add I'm running this from an Apple M1. This may be relevant since the bug references struct.pack, and I'm running on ARM rather than Intel.

[Mario Vilas]

I'm trying to debug this but got stuck pretty quickly - the code seems to be using struct.pack correctly and the architecture should not matter, so all I can think of is some change in the Telegram protocol that this library can't quite parse... :(

[Lonami]

Same problem and solution as #4366 (comment).