[Bug 1574351] Re: package libperl5.22 5.22.1-9 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386

[Balint Reczey]

** Description changed:

+ [Impact]
+ 
+  * Pkgstripfiles generates different stripped documentation for arch:any packages depending on if arch:all packages are built at the same time. In practice it means that amd64 packages may end up different file contents of doc files compared to other architectures making multiarch installation of the affected packages impossible without workarounds.
+  
+  * To fix affected packages by a rebuild the pkgbinarymangler package needs to be backported, too.
+ 
+  * The fix in pkgstripfiles is skipping symlinking documentation to
+ dependent packages with identical content when the dependent packages
+ are not built.
+ 
+ [Test Case]
+ 
+  * To test pkgbinarymangler rebuild perl i386 packages without arch:all packages with the fixed pkgbinarymangler package and observe the following message in the build log:
+ ...
+ Skipping perl-modules-5.26 because it is not to be built
+ ...
+  * Note that PPA builds skip the mangling steps thus the package needs to be built in sbuild/pbuilder/in the official archive with pkgbinarymangler added as an extra package in case of a local build.
+  * The resulting libperl5.2? package can also analyzed to see changelog.Debian.gz not symlinked to perl-modules-5.2?'s changelog.
+ 
+ [Regression Potential]
+ 
+  * The pkgbinarymangler fix may break the pkgstripfiles script causing
+ FTBFS of unrelated packages or could cause building not stripped
+ packages. The former problem would be caught early, while the latter can
+ be avoided by checking the build logs of a few other packages rebuilt
+ with the fixed pkgbinarymangler package.
+ 
+ [Original Bug Text]
+ 
  Don't run aplication after upgrade from 14.04
  
  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: libperl5.22 5.22.1-9
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Sun Apr 24 21:08:20 2016
  DpkgTerminalLog:
-  Preparing to unpack .../libperl5.22_5.22.1-9_i386.deb ...
-  Unpacking libperl5.22:i386 (5.22.1-9) ...
-  dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
-   trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
+  Preparing to unpack .../libperl5.22_5.22.1-9_i386.deb ...
+  Unpacking libperl5.22:i386 (5.22.1-9) ...
+  dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
+   trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  DuplicateSignature:
-  Unpacking libperl5.22:i386 (5.22.1-9) ...
-  dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
-   trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
+  Unpacking libperl5.22:i386 (5.22.1-9) ...
+  dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
+   trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  ErrorMessage: trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  InstallationDate: Installed on 2016-04-24 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  RelatedPackageVersions:
-  dpkg 1.18.4ubuntu1
-  apt  1.2.10ubuntu1
+  dpkg 1.18.4ubuntu1
+  apt  1.2.10ubuntu1
  SourcePackage: perl
  Title: package libperl5.22 5.22.1-9 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1574351

Title:
  package libperl5.22 5.22.1-9 failed to install/upgrade: trying to
  overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz',
  which is different from other instances of package libperl5.22:i386

Status in pkgbinarymangler package in Ubuntu:
  Fix Released

Bug description:
  [Impact]

   * Pkgstripfiles generates different stripped documentation for arch:any packages depending on if arch:all packages are built at the same time. In practice it means that amd64 packages may end up different file contents of doc files compared to other architectures making multiarch installation of the affected packages impossible without workarounds.
   
   * To fix affected packages by a rebuild the pkgbinarymangler package needs to be backported, too.

   * The fix in pkgstripfiles is skipping symlinking documentation to
  dependent packages with identical content when the dependent packages
  are not built.

  [Test Case]

   * To test pkgbinarymangler rebuild perl i386 packages without arch:all packages with the fixed pkgbinarymangler package and observe the following message in the build log:
  ...
  Skipping perl-modules-5.26 because it is not to be built
  ...
   * Note that PPA builds skip the mangling steps thus the package needs to be built in sbuild/pbuilder/in the official archive with pkgbinarymangler added as an extra package in case of a local build.
   * The resulting libperl5.2? package can also analyzed to see changelog.Debian.gz not symlinked to perl-modules-5.2?'s changelog.

  [Regression Potential]

   * The pkgbinarymangler fix may break the pkgstripfiles script causing
  FTBFS of unrelated packages or could cause building not stripped
  packages. The former problem would be caught early, while the latter
  can be avoided by checking the build logs of a few other packages
  rebuilt with the fixed pkgbinarymangler package.

  [Original Bug Text]

  Don't run aplication after upgrade from 14.04

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: libperl5.22 5.22.1-9
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  Date: Sun Apr 24 21:08:20 2016
  DpkgTerminalLog:
   Preparing to unpack .../libperl5.22_5.22.1-9_i386.deb ...
   Unpacking libperl5.22:i386 (5.22.1-9) ...
   dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
    trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  DuplicateSignature:
   Unpacking libperl5.22:i386 (5.22.1-9) ...
   dpkg: error processing archive /var/cache/apt/archives/libperl5.22_5.22.1-9_i386.deb (--unpack):
    trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  ErrorMessage: trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  InstallationDate: Installed on 2016-04-24 (0 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1
   apt  1.2.10ubuntu1
  SourcePackage: perl
  Title: package libperl5.22 5.22.1-9 failed to install/upgrade: trying to overwrite shared '/usr/share/doc/libperl5.22/changelog.Debian.gz', which is different from other instances of package libperl5.22:i386
  UpgradeStatus: No upgrade log present (probably fresh install)

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