[Bug 824708] Re: aptitude can no longer show changelogs: "Changelog download failed: Download queue destroyed."

[Micah Gersten]

Normally I wouldn't upload such large patches to proposed, but since
this is the LTS and it's pretty broken, I'll let the SRU team make the
final call.  Other paperwork seems to be in order.

** Changed in: aptitude (Ubuntu Precise)
       Status: In Progress => Fix Committed

** Changed in: aptitude (Ubuntu Precise)
     Assignee: Micah Gersten (micahg) => (unassigned)

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Title:
  aptitude can no longer show changelogs: "Changelog download failed:
  Download queue destroyed."

Status in “aptitude” package in Ubuntu:
  Fix Released
Status in “aptitude” source package in Precise:
  Fix Committed
Status in “aptitude” package in Debian:
  Fix Released

Bug description:
  Aptitude (<< 0.6.8) can't download/view package changelogs with
  libapt-pkg (>= 0.8.16~exp3).  This affects both the command line
  interface and the interactive (ncurses) interface.

  Viewing a packages changelog is a significant part of deciding which
  updates to apply.  Although the changelogs can still be viewed using
  apt-get, it is a great inconvenience to no longer be able to do this
  from aptitude's interactive interface.

  [Test Case]

  * An unrelated issue in aptitude requires deb-src lines to fetch
    changelogs from the command line. Ensure the system has some valid
    deb-src lines:

    $ sudo echo "deb-src http://archive.ubuntu.com/ubuntu/ precise main" >> /etc/apt/sources.list
    $ sudo apt-get update
    […]

  * Choose a package, say python-apt, and verify the changelog is
    available with apt-get:

    $ apt-get changelog python-apt
    Get:1 Changelog for python-apt (http://changelogs.ubuntu.com/changelogs/pool/main/p/python-apt/python-apt_0.8.0ubuntu7/changelog) [109 kB]
    Fetched 109 kB in 0s (370 kB/s)

  * Attempt to fetch the same changelog using aptitude:

    $ aptitude changelog python-apt
    Err Changelog of python-apt
    E: Changelog download failed: Download queue destroyed.
    E: Couldn't find a changelog for python-apt

  [Regression Potential]

  Small.

  * Moderate size patch which is mostly trivial updates of types to
    unsigned long long as used in libapt-pkg.

  * The updated module is only used to acquire changelogs[1], so any
    regression is likely to be limited to interacting with changelogs.

  * Fixed in Debian sid since June with no regressions reported.

  [1] The module is also used to acquire screenshots by the experimental
      GTK+ interface which is no longer developed and was never
      considered supported by upstream.

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