[Bug 1248433] Re: incorrect behavior when dependency is missing for downgrade

[Julian Andres Klode]

That's an APT bug. It's fixed in Debian, I need to investigate whether
the fix is in Ubuntu.

** Package changed: python-apt (Ubuntu) => apt (Ubuntu)

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

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https://bugs.launchpad.net/bugs/1248433

Title:
  incorrect behavior when dependency is missing for downgrade

Status in “apt” package in Ubuntu:
  In Progress

Bug description:
  Having the following scenario:

  Package: a
  Status: install ok installed
  Version: 2
  Depends: b (= 2)
  Architecture: all

  Package: b
  Status: install ok installed
  Version: 2
  Architecture: all

  Package: a
  Version: 1
  Depends: b (= 1)
  Architecture: all

  
  If I mark_install a, version 1 then it will simply mark package a, version 2 for removal. 
  I would expect an message like "... you have held broken packages" since package b, version 1 is missing from the repository.

  Tested on:
  --------------------------
  Ubuntu 12.04 amd64
  python-apt                                   0.8.3ubuntu7.1

  Thanks

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