Bug#886698: sollya-doc: fails to upgrade from 'stretch' - trying to overwrite /usr/share/doc/sollya/AUTHORS

[Andreas Beckmann]

Package: sollya-doc
Version: 6.0+ds-4
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/#overwriting-files-and-replacing-packages-replaces

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

  Selecting previously unselected package sollya-doc.
  Preparing to unpack .../sollya-doc_6.0+ds-4_all.deb ...
  Unpacking sollya-doc (6.0+ds-4) ...
  dpkg: error processing archive /var/cache/apt/archives/sollya-doc_6.0+ds-4_all.deb (--unpack):
   trying to overwrite '/usr/share/doc/sollya/AUTHORS', which is also in package sollya 6.0+ds-1
  Errors were encountered while processing:
   /var/cache/apt/archives/sollya-doc_6.0+ds-4_all.deb


cheers,

Andreas
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