[Bug 1397605] Re: package squid3 3.3.8-1ubuntu6.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Anders Henke]

During upgrade, a message like

---cut
Setting up squid3 (3.3.8-1ubuntu6.2) ...
Creating Squid HTTP proxy 3.x spool directory structure
2014/12/26 14:47:48| aclParseAclLine: ACL 'manager' already exists with different type.
FATAL: Bungled /etc/squid3/squid.conf line 682: acl manager proto cache_object
Squid Cache (Version 3.3.8): Terminated abnormally.
CPU Usage: 0.008 seconds = 0.000 user + 0.008 sys
Maximum Resident Size: 21376 KB
Page faults with physical i/o: 0
dpkg: error processing package squid3 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 squid3
E: Sub-process /usr/bin/dpkg returned an error code (1)
---cut

shoud've popped up and contains the actual culprit:
the newer version of squid comes with a pre-defined manager-ACL and the line

acl manager proto cache_object

from your /etc/squid3/squid3.conf conflicts with it.

Solution: comment out or remove the line.

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https://bugs.launchpad.net/bugs/1397605

Title:
  package squid3 3.3.8-1ubuntu6.2 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 1

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