patch 8.2.3798: a :def callback function postpones an error message Commit: https://github.com/vim/vim/commit/3b309f11db7904efcae0177c2825597042c07427 Author: Bram Moolenaar <Bram@vim.org> Date: Mon Dec 13 18:19:55 2021 +0000 patch 8.2.3798: a :def callback function postpones an error message Problem: A :def callback function postpones an error message. Solution: Display the error after calling the function. (closes https://github.com/vim/vim/issues/9340)

#!/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