[Bug 1733066] Re: tried to install wps , couldn't and on every startup now I get this message :package libpng12-0 1.2.54-1ubuntu1 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which is different from other instances of package libpng12-0:amd64

[Kai Kasurinen]

libpng12-0:amd64 (1.2.50-2+deb8u3)

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** Changed in: libpng (Ubuntu)
       Status: Confirmed => Invalid

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Title:
  tried to install wps ,couldn't and on every startup now I get this
  message :package libpng12-0 1.2.54-1ubuntu1 failed to install/upgrade:
  trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which
  is different from other instances of package libpng12-0:amd64

Status in libpng package in Ubuntu:
  Invalid

Bug description:
  I tried to install wps office. couldn't as it said it needs some older
  version of libping12 which "could not be installed" so I purged the
  one and installed an older one. Now at every boot I get a crash
  report.

  Ubuntu 16.04 LTS
  Package info:
  $ apt-cache policy libpng12-0

  libpng12-0:
    Installed: 1.2.54-1ubuntu1
    Candidate: 1.2.54-1ubuntu1
    Version table:
   *** 1.2.54-1ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: libpng12-0 1.2.54-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-97.120-generic 4.4.87
  Uname: Linux 4.4.0-97-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  Date: Fri Nov 17 12:21:37 2017
  Dependencies:
   gcc-6-base 6.0.1-0ubuntu1
   libc6 2.23-0ubuntu9 [origin: unknown]
   libgcc1 1:6.0.1-0ubuntu1
   zlib1g 1:1.2.8.dfsg-2ubuntu4.1 [origin: unknown]
  DpkgTerminalLog:
   Preparing to unpack .../libpng12-0_1.2.54-1ubuntu1_amd64.deb ...
   Unpacking libpng12-0:amd64 (1.2.54-1ubuntu1) over (1.2.50-2+deb8u3) ...
   dpkg: error processing archive /var/cache/apt/archives/libpng12-0_1.2.54-1ubuntu1_amd64.deb (--unpack):
    trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which is different from other instances of package libpng12-0:amd64
  DuplicateSignature:
   package:libpng12-0:1.2.54-1ubuntu1
   Unpacking libpng12-0:amd64 (1.2.54-1ubuntu1) over (1.2.50-2+deb8u3) ...
   dpkg: error processing archive /var/cache/apt/archives/libpng12-0_1.2.54-1ubuntu1_amd64.deb (--unpack):
    trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which is different from other instances of package libpng12-0:amd64
  ErrorMessage: trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which is different from other instances of package libpng12-0:amd64
  InstallationDate: Installed on 2017-04-22 (209 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.2
   apt  1.2.24
  SourcePackage: libpng
  Title: package libpng12-0 1.2.54-1ubuntu1 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libpng12-0/ANNOUNCE', which is different from other instances of package libpng12-0:amd64
  UpgradeStatus: No upgrade log present (probably fresh install)

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