patch 8.2.0488: Vim9: compiling can break when using a lambda inside :def Commit: https://github.com/vim/vim/commit/05afceeddc4afbbca60e4e6a729a50d33d4b19f7 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Mar 31 23:32:31 2020 +0200 patch 8.2.0488: Vim9: compiling can break when using a lambda inside :def Problem: Vim9: Compiling can break when using a lambda inside :def. Solution: Do not keep a pointer to the dfunc_T for longer time.

#!/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