[Bug 863675] Re: dpkg wrongly claims that a foreign-arch package is disappeared by a removed native-arch package

Steve Langasek steve.langasek at canonical.com
Fri Sep 30 21:27:08 UTC 2011


** Changed in: dpkg (Ubuntu)
       Status: New => Triaged

** Changed in: dpkg (Ubuntu)
   Importance: Undecided => High

** Description changed:

  This bug has been hovering in the background for a while with multiarch,
  and I've recently pinned it down.
  
  When a native-architecture package is removed and a foreign-architecture
  package gets installed, dpkg makes a wrong calculation somewhere which,
  on upgrade, results in the foreign-architecture package being
  "disappeared" from the database.  This results in all the files from the
  package being left on disk (orphaned), and apt happily removing any
  dependencies of the package that were auto-installed.
  
  Reproducer:
  
  1.Download the 64-bit skype package from <http://www.skype.com/intl/en-
  us/get-skype/on-your-computer/linux/downloading.ubuntu64> and install it
  with dpkg (fixing up the dependencies with 'apt-get -f install').
  
  2. Install the skype:i386 package from the Canonical Partner repository for oneiric, using either Software Center or 'apt-get install skype:i386'.
  $ sudo apt-get install skype:i386
  Reading package lists... Done
- Building dependency tree       
+ Building dependency tree
  Reading state information... Done
  The following packages will be REMOVED:
-   skype
+   skype
  The following NEW packages will be installed:
-   skype:i386
+   skype:i386
  0 upgraded, 1 newly installed, 1 to remove and 156 not upgraded.
  Need to get 0 B/23.6 MB of archives.
  After this operation, 489 kB of additional disk space will be used.
- Do you want to continue [Y/n]? 
+ Do you want to continue [Y/n]?
  
  3. Confirm that skype is now removed, but not purged.
  $ dpkg -l skype:*
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name           Version        Description
  +++-==============-==============-============================================
  rc  skype          2.2.0.35-1     Skype
  ii  skype:i386     2.2.0.35-0onei VOIP and instant messaging client
  
  4. Make sure at least one package is out of date on the system and run 'sudo apt-get upgrade':
  [...]
  Preparing to replace libasound2-python 1.0.24.1-0ubuntu8 (using .../libasound2-p
  ython_1.0.24.1-0ubuntu10_amd64.deb) ...
  Unpacking replacement libasound2-python ...
  (Noting disappearance of skype:i386, which has been completely replaced.)
  [...]
  Setting up unity-2d (4.12.0-0ubuntu1) ...
  Processing triggers for libc-bin ...
  ldconfig deferred processing now taking place
  Processing triggers for python-support ...
  The following package disappeared from your system as
  all files have been overwritten by other packages:
-   skype
+   skype
  Note: This is done automatic and on purpose by dpkg.
  $
+ 
+ 5. See that skype:i386 really has been disappeared, and skype:amd64 is still in state 'rc'.
+ $ dpkg -l skype:*
+ Desired=Unknown/Install/Remove/Purge/Hold
+ | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
+ |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
+ ||/ Name           Version        Description
+ +++-==============-==============-============================================
+ rc  skype          2.2.0.35-1     Skype
+ un  skype:i386     <none>         (no description available)
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: dpkg 1.16.0.3ubuntu4
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  ApportVersion: 1.23-0ubuntu2
  Architecture: amd64
  Date: Fri Sep 30 13:48:16 2011
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  ProcEnviron:
-  PATH=(custom, user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: dpkg
  UpgradeStatus: Upgraded to oneiric on 2011-09-23 (6 days ago)
  modified.conffile..etc.dpkg.dpkg.cfg: [modified]
  mtime.conffile..etc.dpkg.dpkg.cfg: 2011-08-16T12:02:14.243634

** Also affects: dpkg (Ubuntu Oneiric)
   Importance: High
       Status: Triaged

** Changed in: dpkg (Ubuntu Oneiric)
    Milestone: None => oneiric-updates

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https://bugs.launchpad.net/bugs/863675

Title:
  dpkg wrongly claims that a foreign-arch package is disappeared by a
  removed native-arch package

Status in “dpkg” package in Ubuntu:
  Triaged
Status in “dpkg” source package in Oneiric:
  Triaged

Bug description:
  This bug has been hovering in the background for a while with
  multiarch, and I've recently pinned it down.

  When a native-architecture package is removed and a foreign-
  architecture package gets installed, dpkg makes a wrong calculation
  somewhere which, on upgrade, results in the foreign-architecture
  package being "disappeared" from the database.  This results in all
  the files from the package being left on disk (orphaned), and apt
  happily removing any dependencies of the package that were auto-
  installed.

  Reproducer:

  1.Download the 64-bit skype package from <http://www.skype.com/intl
  /en-us/get-skype/on-your-computer/linux/downloading.ubuntu64> and
  install it with dpkg (fixing up the dependencies with 'apt-get -f
  install').

  2. Install the skype:i386 package from the Canonical Partner repository for oneiric, using either Software Center or 'apt-get install skype:i386'.
  $ sudo apt-get install skype:i386
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  The following packages will be REMOVED:
    skype
  The following NEW packages will be installed:
    skype:i386
  0 upgraded, 1 newly installed, 1 to remove and 156 not upgraded.
  Need to get 0 B/23.6 MB of archives.
  After this operation, 489 kB of additional disk space will be used.
  Do you want to continue [Y/n]?

  3. Confirm that skype is now removed, but not purged.
  $ dpkg -l skype:*
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name           Version        Description
  +++-==============-==============-============================================
  rc  skype          2.2.0.35-1     Skype
  ii  skype:i386     2.2.0.35-0onei VOIP and instant messaging client

  4. Make sure at least one package is out of date on the system and run 'sudo apt-get upgrade':
  [...]
  Preparing to replace libasound2-python 1.0.24.1-0ubuntu8 (using .../libasound2-p
  ython_1.0.24.1-0ubuntu10_amd64.deb) ...
  Unpacking replacement libasound2-python ...
  (Noting disappearance of skype:i386, which has been completely replaced.)
  [...]
  Setting up unity-2d (4.12.0-0ubuntu1) ...
  Processing triggers for libc-bin ...
  ldconfig deferred processing now taking place
  Processing triggers for python-support ...
  The following package disappeared from your system as
  all files have been overwritten by other packages:
    skype
  Note: This is done automatic and on purpose by dpkg.
  $

  5. See that skype:i386 really has been disappeared, and skype:amd64 is still in state 'rc'.
  $ dpkg -l skype:*
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name           Version        Description
  +++-==============-==============-============================================
  rc  skype          2.2.0.35-1     Skype
  un  skype:i386     <none>         (no description available)

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: dpkg 1.16.0.3ubuntu4
  ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
  Uname: Linux 3.0.0-11-generic x86_64
  ApportVersion: 1.23-0ubuntu2
  Architecture: amd64
  Date: Fri Sep 30 13:48:16 2011
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: dpkg
  UpgradeStatus: Upgraded to oneiric on 2011-09-23 (6 days ago)
  modified.conffile..etc.dpkg.dpkg.cfg: [modified]
  mtime.conffile..etc.dpkg.dpkg.cfg: 2011-08-16T12:02:14.243634

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