[Bug 1200320] Re: package apt 0.8.16~exp5ubuntu13.7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[dino99]

Oneiric is no more maintained since a while, and such issue is not met
with recent package

** Changed in: apt (Ubuntu)
       Status: New => Invalid

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Title:
  package apt 0.8.16~exp5ubuntu13.7 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

Status in apt package in Ubuntu:
  Invalid

Bug description:
  Trying to get from 11.04 to 12.04.

  - Replaced 11.04 sources list with old-releases repos.
  - Added to keyring
  sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 437D05B5 3E5C1192
  - do-release-upgrade 

  Finally starts working to go to 11.10 but fails with the following
  error.

  
  Setting up apt (0.8.16~exp5ubuntu13.7) ...
  Installing new version of config file /etc/cron.daily/apt ...
  Installing new version of config file /etc/apt/apt.conf.d/20changelog ...
  ERROR: Can't find the archive-keyring
  Is the ubuntu-keyring package installed?
  dpkg: error processing apt (--configure):
   subprocess installed post-installation script returned error exit status 1
  Exception during pm.DoInstall():  E:Sub-process /usr/bin/dpkg returned an error code (1)

  *** The package "apt 0.8.16~exp5ubuntu13.7" failed to install or
  upgrade.

  ProblemType: Package
  DistroRelease: Ubuntu 11.10
  Package: apt 0.8.16~exp5ubuntu13.7
  ProcVersionSignature: Ubuntu 2.6.38-8.42-virtual 2.6.38.2
  Uname: Linux 2.6.38-8-virtual x86_64
  Architecture: amd64
  Date: Thu Jul 11 17:42:28 2013
  Ec2AMI: ami-409e4c29
  Ec2AMIManifest: (unknown)
  Ec2AvailabilityZone: us-east-1b
  Ec2InstanceType: m1.small
  Ec2Kernel: aki-427d952b
  Ec2Ramdisk: unavailable
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  SourcePackage: apt
  Title: package apt 0.8.16~exp5ubuntu13.7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: Upgraded to oneiric on 2013-07-11 (0 days ago)

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