[Bug 173904] Re: (un)markauto tries to remove packages unnecessarily

[Daniel Hartwig]

** Bug watch added: Debian Bug tracker #142699
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=142699

** Also affects: aptitude (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=142699
   Importance: Unknown
       Status: Unknown

** No longer affects: aptitude (Debian)

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https://bugs.launchpad.net/bugs/173904

Title:
  (un)markauto tries to remove packages unnecessarily

Status in “aptitude” package in Ubuntu:
  Triaged

Bug description:
  Binary package hint: aptitude

  On gutsy, using aptitude unmarkauto or aptitude markauto, to change the automatically installed status of a package
  that does not have any other packages dependent on it, causes aptitude to remove the package.

  For example:
  $ aptitude search ~neukleides
  i A eukleides                                                              - Euclidean geometry drawing language                                             
  i   xeukleides                                                             - System for drawing and viewing Euclidean geometry figures                       

  xeukleides depends on eukleides, I can mark eukleides as not automatically installed without any problems:
  $ sudo aptitude unmarkauto eukleides
  [...]
  $ aptitude search ~neukleides
  i   eukleides                                                              - Euclidean geometry drawing language                                             
  i   xeukleides                                                             - System for drawing and viewing Euclidean geometry figures                       

  And I can mark eukleides as automatically installed again:
  $ sudo aptitude unmarkauto eukleides
  [...]
  $ aptitude search ~neukleides
  i A eukleides                                                              - Euclidean geometry drawing language                                             
  i   xeukleides                                                             - System for drawing and viewing Euclidean geometry figures                       

  No packages depend on xeukleides. When I try to mark xeukleides as automatically installed, aptitude wants to remove xeukleides:
  $ aptitude -s markauto xeukleides 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Reading extended state information       
  Initializing package states... Done
  Building tag database... Done      
  The following packages are unused and will be REMOVED:
    eukleides xeukleides 
  0 packages upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
  Need to get 0B of archives. After unpacking 872kB will be freed.
  Do you want to continue? [Y/n/?] 
  Would download/install/remove packages.

  I now remove xeukleides:
  $ sudo apt-get remove xeukleides
  [...]
  The following packages were automatically installed and are no longer required:
    eukleides
  Use 'apt-get autoremove' to remove them.
  The following packages will be REMOVED:
    xeukleides
  0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
  Need to get 0B of archives.
  After unpacking 254kB disk space will be freed.
  Do you want to continue [Y/n]? Y
  (Reading database ... 160896 files and directories currently installed.)
  Removing xeukleides ...

  Now no packages depend on eukleides, I try to mark eukleides as not automatically installed and aptitude wants to remove it:
  $ aptitude -s unmarkauto eukleides 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Reading extended state information      
  Initializing package states... Done
  Building tag database... Done      
  The following packages are unused and will be REMOVED:
    eukleides 
  0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
  Need to get 0B of archives. After unpacking 618kB will be freed.
  Do you want to continue? [Y/n/?] 
  Would download/install/remove packages.

  I'm using aptitude version 0.4.6.1: 
  $ aptitude --version
  aptitude 0.4.6.1 compiled at Sep 15 2007 09:21:46
  Compiler: g++ 4.1.3 20070831 (prerelease) (Ubuntu 4.1.2-16ubuntu1)

  NCurses version: 5.6
  libsigc++ version: 2.0.17

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