[Bug 1571087] Re: apt gets confused about a dependency's version, falls over?

[Dan Kegel]

Hah.  Invalid.  The confusion came from another package that had been
built against the earlier ssl.  Rebuilding all old packages built
against the earlier beta seems to have solved things.

So at worst, apt's error messages are hard to decipher... but we already
knew that.

Please close and forget this bug was ever filed :-)

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https://bugs.launchpad.net/bugs/1571087

Title:
  apt gets confused about a dependency's version, falls over?

Status in apt package in Ubuntu:
  New

Bug description:
  This problem affects today's Xenial release candidate.

  I generated a package with mk-build-deps, and tried installing it.
  Here's its control file:

  Package: foo-blort3.23-build-deps
  Version: 3.23.1-76
  Architecture: all
  Maintainer: Buildus Bottus <buildbot at testbot02>
  Installed-Size: 10
  Depends: build-essential:amd64, debhelper (>= 7), autoconf, automake, autotools-dev, libasound2-dev, libavahi-client-dev, libfaac-dev, libfaad-dev, libffi-dev, libfontconfig1-dev, libfreetype6-dev, libgl1-mesa-dev, libglu1-mesa-dev, libicu-dev, libmagick++-dev, libpng12-dev, libselinux1-dev, libssl-dev, libtiff4-dev | libtiff5-dev, libudev-dev, libx11-dev, libxcomposite-dev, libxml2-dev, libxrender-dev, libyaml-dev, m4, mesa-common-dev, foo-decklink-sdk-static, foo-yobuild11-boost, foo-yobuild11-cmake, foo-yobuild11-curl | libcurl4-openssl-dev, foo-yobuild11-gnutls | libgnutls-dev (>= 3.3), foo-yobuild11-gst-plugins-base, foo-yobuild11-gstreamer, foo-yobuild11-libusb | libusb-1.0-0-dev (>= 2:1.0.19), foo-yobuild11-nettle | nettle-dev (>= 3.1.1), foo-yobuild11-nettle | libtasn1-6-dev, foo-yobuild11-nettle | libp11-kit-dev, foo-yobuild11-vars, ruby (>= 1:1.9.3.4) | rubygems, ruby-dev, rubygem-json, ttf-dejavu-extra, westar-foo-dev
  Section: devel
  Priority: optional
  Multi-Arch: foreign
  Description: build-dependencies for foo-blort3.23
   Dependency package to build the 'foo-blort3.23' package

  (Ignore all those packages that start with foo-, those are local.)

  This worked fine from ubuntu 10.04 through ubuntu 16.04 beta 2, but when I updated to final beta (with apt-get dist-upgrade),
  it failed, with error

  Correcting dependencies...Starting pkgProblemResolver with broken count: 1
  Starting 2 pkgProblemResolver with broken count: 1
  Investigating (0) foo-blort3.23-build-deps [ amd64 ] < 3.23.1-76 > ( devel )
  Broken foo-blort3.23-build-deps:amd64 Depends on libssl-dev [ amd64 ] < none -> 1.0.2g-1ubuntu3 > ( libdevel )
    Considering libssl-dev:amd64 1 as a solution to foo-blort3.23-build-deps:amd64 -2
    Removing foo-blort3.23-build-deps:amd64 rather than change libssl-dev
  Done
   Done
  Starting pkgProblemResolver with broken count: 0
  Starting 2 pkgProblemResolver with broken count: 0
  Done
  The following packages will be REMOVED:
    foo-blort3.23-build-deps

  "apt-cache policy libssl-dev" before the problem reports:

  libssl-dev:
    Installed: (none)
    Candidate: 1.0.2g-1ubuntu4
    Version table:
       1.0.2g-1ubuntu4 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages

  There seems to be some confusion about the version of libssl-dev: 1.0
  .2g-1ubuntu3 vs 1.0.2g-1ubuntu4  ?

  Installing libssl-dev before installing the package generated by mk-
  build-deps worked around the problem.

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