patch 8.2.1698: cannot lock a variable in legacy Vim script like in Vim9 Commit: https://github.com/vim/vim/commit/a187c43cfe8863d48b2159d695fedcb71f8525c1 Author: Bram Moolenaar <Bram@vim.org> Date: Wed Sep 16 21:08:28 2020 +0200 patch 8.2.1698: cannot lock a variable in legacy Vim script like in Vim9 Problem: Cannot lock a variable in legacy Vim script like in Vim9. Solution: Make ":lockvar 0" work.

#!/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)