the i386 and amb64 versions break each other

Bug #1455780 reported by Ron Johnson on 2015-05-16
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
libvpx (Ubuntu)
Undecided
Unassigned

Bug Description

Trying to install wine1.6 leads to a series of dependency errors that lead back to libvpx1:i386.

Trying to install that package means that libvpx1:amd64 is to be removed, which then wants to remove a whole bunch of other, important, packages, like software-center & gnome-control-center.

$ sudo apt-get install libvpx1:i386
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  colord dvipng ffmpeg gnome-control-center graphviz gstreamer1.0-libav
  gstreamer1.0-plugins-bad gstreamer1.0-plugins-good gvfs-backends
  handbrake-gtk hplip libavcodec-dev libavcodec54 libavformat-dev
  libavformat54 libcheese-gtk23 libcheese7 libchromaprint0 libgd3 libgphoto2-6
  libgvc6 libopencv-contrib2.4 libopencv-highgui2.4 libopencv-legacy2.4
  libopencv-objdetect2.4 libsane libvpx-dev libvpx1
  printer-driver-postscript-hp python-pygraphviz sane-utils simple-scan
  software-center vlc vlc-nox vlc-plugin-notify vlc-plugin-samba xdot
The following NEW packages will be installed:
  libvpx1:i386
0 upgraded, 1 newly installed, 38 to remove and 93 not upgraded.
Need to get 525 kB of archives.
After this operation, 188 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.

--=====

$ lsb_release -rd
Description: Ubuntu 14.04.2 LTS
Release: 14.04

--=====

What I expect to happen: in a multi-arch system, that amd64 and i386 packages happily coexist.

--=====

What happens instead: they break each other.

$ apt-cache depends libvpx1
libvpx1
  Depends: libc6
  PreDepends: multiarch-support
    multiarch-support:i386
  Replaces: libvpx1:i386
  Breaks: libvpx1:i386

$ apt-cache depends libvpx1:i386
libvpx1:i386
  Depends: libc6:i386
  PreDepends: multiarch-support:i386
    multiarch-support
  Replaces: libvpx1
  Breaks: libvpx1

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