patch 8.2.3402: invalid memory access when using :retab with large value Commit: https://github.com/vim/vim/commit/b7081e135a16091c93f6f5f7525a5c58fb7ca9f9 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Sep 4 18:47:28 2021 +0200 patch 8.2.3402: invalid memory access when using :retab with large value Problem: Invalid memory access when using :retab with large value. Solution: Check the number is positive.

#!/bin/bash
set -e

apt-get install -y xvfb

cat <<EOT >/etc/systemd/system/xvfb.service
[Unit]
Description=X Virtual Frame Buffer Service
After=network.target
[Service]
ExecStart=/usr/bin/Xvfb :99 -screen 0 1024x768x24
[Install]
WantedBy=multi-user.target
EOT

systemctl enable xvfb.service
systemctl start xvfb.service