[Bug 717397] Re: package squid 2.7.STABLE7-1ubuntu12.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Clint Byrum]

Hello Greg (and duplicate reporters), thanks for taking the time to file
this bug report!

So unfortunately, this is likely the result of the squid process having
disappeared because of bug #573853 , which ironically was fixed in the
package that you are all trying to install.

This is a temporary problem, and the way to alleviate it is to kill
squid off manually (it may still be running despite upstart having lost
track of it), and then start it manually.

These three commands may print errors (and may leave your system in a
bad state, so please be cautious), but should lead to the upgrade
finishing:

sudo stop squid
sudo killall squid
sudo start squid
sudo dpkg --configure -a

Unfortunately, given the nature of the bug fixed there's no safe way
that I have come up with to plan for this possible failure and get
around it in the postinst. Given that, I believe this bug has to be
closed as Won't Fix.

If someone comes up with a better way to handle the upgrade when the
squid job is in an unknown state, then please re-open it.

** Changed in: squid (Ubuntu)
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/717397

Title:
  package squid 2.7.STABLE7-1ubuntu12.1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1