patch 8.2.2977: crash when using a null function reference Commit: https://github.com/vim/vim/commit/22db0d549f64aa3d8a6e366b70eb8d7e66933b82 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jun 12 12:16:55 2021 +0200 patch 8.2.2977: crash when using a null function reference Problem: Crash when using a null function reference. (Naohiro Ono) Solution: Check for an invalid function name. (closes https://github.com/vim/vim/issues/8367)

#!/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