Bug#901670: python3-ffc: fails to upgrade from 'sid' - trying to overwrite /usr/bin/ffc

[Andreas Beckmann]

Package: python3-ffc
Version: 2018.1.0-1exp1
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts

Hi,

during a test with piuparts I noticed your package fails to upgrade from
'sid' to 'experimental'.
It installed fine in 'sid', then the upgrade to 'experimental' fails
because it tries to overwrite other packages files without declaring a
Breaks+Replaces relation.

See policy 7.6 at
https://www.debian.org/doc/debian-policy/#overwriting-files-and-replacing-packages-replaces

>From the attached log (scroll to the bottom...):

  Selecting previously unselected package python3-ffc.
  Preparing to unpack .../10-python3-ffc_2018.1.0-1exp1_all.deb ...
  Unpacking python3-ffc (2018.1.0-1exp1) ...
  dpkg: error processing archive /tmp/apt-dpkg-install-jFyip6/10-python3-ffc_2018.1.0-1exp1_all.deb (--unpack):
   trying to overwrite '/usr/bin/ffc', which is also in package python-ffc 2017.2.0.post0-2
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
  Errors were encountered while processing:
   /tmp/apt-dpkg-install-jFyip6/10-python3-ffc_2018.1.0-1exp1_all.deb


cheers,

Andreas
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