Comment 4 for bug 1887744

Replicated on my local Ubuntu 20.04 system with systemd 245.4-4ubuntu3.1.

It's a PEBCAK error where a user writes a .service file containing %i's, but instead of naming the file <email address hidden>, just names it foo.service. To replicate:

cd /etc/systemd/system
curl -s -o testemail2jira.service 'https://hg.sr.ht/~redradishtech/testemail2jira/raw/testemail2jira%40.service?rev=tip'
systemctl daemon-reload
systemctl start testemail2jira

On one of the last two steps everything freezes, errors start appearing:

[system] Failed to activate service 'org.freedesktop.systemd1': timed out (service_start_timeout=25000ms)

and /var/crash/_usr_lib_systemd_systemd.0.crash is created.