patch 8.2.3748: giving an error for an empty sign argument breaks a plugin Commit: https://github.com/vim/vim/commit/e5710a02cb78c2a0a868ea55740835c78ddecbb4 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Dec 5 19:10:04 2021 +0000 patch 8.2.3748: giving an error for an empty sign argument breaks a plugin Problem: Giving an error for an empty sign argument breaks a plugin. Solution: Do not give an error.

#!/usr/bin/env python
#
# Server that will accept connections from a Vim channel.
# Used by test_channel.vim.
#
# This requires Python 2.6 or later.

from test_channel import main, ThreadedTCPServer
import socket

class ThreadedTCP6Server(ThreadedTCPServer):
    address_family = socket.AF_INET6

if __name__ == "__main__":
    main("::", 0, ThreadedTCP6Server)