patch 9.0.1763: crash when passing invalid buffer to undotree() Commit: https://github.com/vim/vim/commit/ab9f2ecfd4ecaf74eeed0e5ec41355589af3ec8f Author: zeertzjq <zeertzjq@outlook.com> Date: Sun Aug 20 18:35:10 2023 +0200 patch 9.0.1763: crash when passing invalid buffer to undotree() Problem: crash when passing invalid buffer to undotree() Solution: Use get_buf_arg() instead of tv_get_buf_from_arg(). closes: #12862 closes: #12830 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: zeertzjq <zeertzjq@outlook.com>

#!/usr/bin/python
#
# Program that writes a number to stdout repeatedly
#
# This requires Python 2.6 or later.

from __future__ import print_function
import sys
import time

if __name__ == "__main__":

    done = 0
    while done < 10:
        done = done + 1
        print(done)
        sys.stdout.flush()
        time.sleep(0.05)  # sleep 50 msec