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[Launchpad Bug Tracker <1642582@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package mtx - 1.3.12-9ubuntu0.16.04.1

---------------
mtx (1.3.12-9ubuntu0.16.04.1) xenial; urgency=medium

  * Remove bash completions, they are also in the bash-completion package.
    This avoids file-conflict on the s390x architecture, as new enough
    bash-completion debhelper addon generated the conflict on that
    architecture only. LP: #1642582

 -- Dimitri John Ledkov <xnox@xxxxxxxxxx>  Wed, 12 Apr 2017 10:44:20
+0100

** Changed in: mtx (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1642582

Title:
  mtx package version 1.3.12-9 installation fails with duplicate bash-
  completion via apt-get

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in mtx package in Ubuntu:
  Fix Released
Status in mtx source package in Xenial:
  Fix Released
Status in mtx source package in Yakkety:
  Fix Released
Status in mtx source package in Zesty:
  Fix Released
Status in mtx package in Debian:
  Fix Released

Bug description:
  [Impact]

  * mtx package has an arch-skew contents. On xenial and yakkety, on s390x, the package was build with new enough bash-completion debhelper addon that has placed the completion files into /usr which generates file conflict with bash-completion package itself
  * on all other architectures in xenial and yakkety the bash completion file is shipped by the mtx package, redundantly in /etc, when there is a completion file in /usr in bash-completion package already
  * in zesty the bash completion file got remoted from the mtx package in favor of bash-completion package one.
  * to avoid file conflict on s390x on xenial/yakkety, I'm proposing to rebuild mtx package on xenial and yakkety and remove the redudant bash completion file

  [Testcase]
  * Co-install mtx package and bash-completion package, without any file conflicts
  * Verify that /etc/bash_completion.d/mtx file does not exist and/or is removed during the installation of the new mtx package (that should happen on non-s390x architectures)
  * Verify that mtx bash completion is still available

  [Original bug report]

  Summary
  =======
  Machine: IBM z13, Ubuntu 16.04.01. uname -a
  Linux s8314007 4.4.0-47-generic #68-Ubuntu SMP Wed Oct 26 19:42:36 UTC 2016 s390x s390x s390x GNU/Linux
  We were unable to install the 'mtx' package for control of tape autochangers via 'apt-get install mtx'

  Details
  =======
  We wanted to install both the mt-st and mtx packages for s390 tape support.
  We encountered a problem in the mtx_1.3.12-9_s390x.deb package which was downloaded to /var/cache/apt/archives/ location but installation was not performed due to duplicate bash completion data being delivered.
  See the console output section below for results and more details about the error itself.
  We expect the mtx package to install smoothly with apt-get install mtx.

  We worked around with:
  ~~~~~~~~~~~~~~~~~~~~~~
  # dpkg  --force-overwrite -i /var/cache/apt/archives/mtx_1.3.12-9_s390x.deb
  (Reading database ... 76609 files and directories currently installed.)
  Preparing to unpack .../mtx_1.3.12-9_s390x.deb ...
  Unpacking mtx (1.3.12-9) ...
  dpkg: warning: overriding problem because --force enabled:
  dpkg: warning: trying to overwrite '/usr/share/bash-completion/completions/mtx', which is also in package bash-completion 1:2.1-4.2ubuntu1.1
  Setting up mtx (1.3.12-9) ...
  Processing triggers for man-db (2.7.5-1) ...
  # dpkg -l|grep mtx
  ii  mtx                                1.3.12-9                        s390x        controls tape autochangers

  Console output
  ==============
  # apt-get install mtx -y
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  The following NEW packages will be installed:
    mtx
  0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
  Need to get 93.9 kB of archives.
  After this operation, 395 kB of additional disk space will be used.
  Get:1 http://ports.ubuntu.com xenial/main s390x mtx s390x 1.3.12-9 [93.9 kB]
  Fetched 93.9 kB in 0s (0 B/s)
  (Reading database ... 76609 files and directories currently installed.)
  Preparing to unpack .../mtx_1.3.12-9_s390x.deb ...
  Unpacking mtx (1.3.12-9) ...
  dpkg: error processing archive /var/cache/apt/archives/mtx_1.3.12-9_s390x.deb (--unpack):
   trying to overwrite '/usr/share/bash-completion/completions/mtx', which is also in package bash-completion 1:2.1-4.2ubuntu1.1
  Processing triggers for man-db (2.7.5-1) ...
  Errors were encountered while processing:
   /var/cache/apt/archives/mtx_1.3.12-9_s390x.deb
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  #

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