Bug#874422: python-pycoast-doc: fails to upgrade from 'stretch' - trying to overwrite /usr/share/doc-base/pycoast

[Andreas Beckmann]

Package: python-pycoast-doc
Version: 1.0.0+dfsg-1
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
'stretch'.
It installed fine in 'stretch', then the upgrade to 'buster' 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/ch-relationships.html#s-replaces

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

  Selecting previously unselected package python-pycoast-doc.
  Preparing to unpack .../5-python-pycoast-doc_1.0.0+dfsg-1_all.deb ...
  Unpacking python-pycoast-doc (1.0.0+dfsg-1) ...
  dpkg: error processing archive /tmp/apt-dpkg-install-Mstk25/5-python-pycoast-doc_1.0.0+dfsg-1_all.deb (--unpack):
   trying to overwrite '/usr/share/doc-base/pycoast', which is also in package python-pycoast 0.5.4+dfsg-1
  Errors were encountered while processing:
   /tmp/apt-dpkg-install-Mstk25/5-python-pycoast-doc_1.0.0+dfsg-1_all.deb


cheers,

Andreas
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