Wrong number of arguments in _signal_handler()

[igogold]

When I send Ctrl+C / SIGTERM to running bot script I got such errors (signal should be send twice to completely exit):

Traceback (most recent call last):
  File "/usr/local/bin/icqbot.py", line 510, in <module>
    main()
  File "/usr/local/bin/icqbot.py", line 87, in main
    run_service()
  File "/usr/local/bin/icqbot.py", line 121, in run_service
    bot.idle()
  File "/usr/local/lib/python-venv/icqbot/lib/python3.7/site-packages/bot/bot.py", line 155, in idle
    sleep(1)
TypeError: _signal_handler() takes 2 positional arguments but 3 were given
Exception ignored in: <module 'threading' from '/usr/lib/python3.7/threading.py'>
Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 1281, in _shutdown
    t.join()
  File "/usr/lib/python3.7/threading.py", line 1032, in join
    self._wait_for_tstate_lock()
  File "/usr/lib/python3.7/threading.py", line 1048, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
TypeError: _signal_handler() takes 2 positional arguments but 3 were given

I think error because of

signal.signal(signalnum, handler)
The handler is called with two arguments: the signal number and the current stack frame (None or a frame object; for a description of frame objects, see the description in the type hierarchy or see the attribute descriptions in the inspect module).

but _signal_handler() want to get only one argument (after self), not two.

def _signal_handler(self, sig: int):

[retrydev]

def _signal_handler(self, sig, _):