Thank you for taking the time to report this bug and helping to make
Ubuntu better. It seems that there was an error on your system when
trying to install a particular package. Please execute the following
command, as it will clear your package cache, in a terminal:

sudo apt-get clean

Then try performing the update again. This will likely resolve your
issue, but the failure could be caused by filesystem or memory
corruption. So please also run a fsck on your filesystem(s) and a memory
test. Thanks in advance!


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

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https://bugs.launchpad.net/bugs/1808748

Title:
  package libapt-pkg5.0 1.6.3 failed to install/upgrade: dpkg-deb
  --control subprocess returned error exit status 2

Status in apt package in Ubuntu:
  Invalid

Bug description:
  I don't know exactly what is broken.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: libapt-pkg5.0 1.6.3
  ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
  Uname: Linux 4.15.0-29-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Sun Dec 16 12:20:50 2018
  DpkgTerminalLog:
   dpkg-deb: error: 
'/var/cache/apt/archives/libapt-pkg5.0_1.6.3ubuntu0.1_amd64.deb' is not a 
Debian format archive
   dpkg: error processing archive 
/var/cache/apt/archives/libapt-pkg5.0_1.6.3ubuntu0.1_amd64.deb (--unpack):
    dpkg-deb --control subprocess returned error exit status 2
  ErrorMessage: dpkg-deb --control subprocess returned error exit status 2
  InstallationDate: Installed on 2018-12-15 (1 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 
3.6.5-3ubuntu1
  PythonDetails: N/A
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.3
  SourcePackage: apt
  Title: package libapt-pkg5.0 1.6.3 failed to install/upgrade: dpkg-deb 
--control subprocess returned error exit status 2
  UpgradeStatus: No upgrade log present (probably fresh install)

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