Comment 3 for bug 552360

Same goes for trying to purge squid.

daniel@miyazaki:~$ LC_ALL=C sudo dpkg -P squid
(Reading database ... 183846 files and directories currently installed.)
Removing squid ...
stop: Job failed while stopping
invoke-rc.d: initscript squid, action "stop" failed.
dpkg: error processing squid (--purge):
 subprocess installed pre-removal script returned error exit status 1
squid start/running, process 4326
Errors were encountered while processing:
 squid
daniel@miyazaki:~$