patch 8.2.3481: failures when char is unsigned Commit: https://github.com/vim/vim/commit/2e258bd79f403bcccb1336bea70803957a83808f Author: James McCoy <jamessan@jamessan.com> Date: Tue Oct 5 19:44:04 2021 +0100 patch 8.2.3481: failures when char is unsigned Problem: Failures when char is unsigned. Solution: Use int8_T. Make a CI run with unsigned char. (James McCoy, closes #8936)

#!/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