Upstart hangs on reboot when "expect" is misspecified

[Marti]

While I was trying to create an Upstart conf file for daemonlogger, I tripped on a case where upstart failed to bring down the broken service. As it appeared stuck, I wanted to reboot the machine, and that became stuck as well. Finally I had to power cycle the machine to fix it (although it eventually quits after a timeout, too).

Here's how to reproduce the hang:

apt-get install daemonlogger

cat > /etc/init/daemonlogger.conf <<EOF
expect fork
script
    daemonlogger -d -i eth0 -n eth0 -l /tmp
end script
EOF

start daemonlogger
stop daemonlogger [hangs forever]
^C
reboot
[hangs at "Asking all remaining processes to terminate..."]