patch 8.2.4977: memory access error when substitute expression changes window Commit: https://github.com/vim/vim/commit/e2bd8600b873d2cd1f9d667c28cba8b1dba18839 Author: Bram Moolenaar <Bram@vim.org> Date: Wed May 18 13:11:57 2022 +0100 patch 8.2.4977: memory access error when substitute expression changes window Problem: Memory access error when substitute expression changes window. Solution: Disallow changing window in substitute expression.

#!/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