Bug#881741: python3-tables: fails to upgrade from 'stretch' - trying to overwrite /usr/bin/pt2to3

[Andreas Beckmann]

Package: python3-tables
Version: 3.4.2-1
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...):

  Preparing to unpack .../12-python3-tables_3.4.2-1_all.deb ...
  Unpacking python3-tables (3.4.2-1) over (3.3.0-5) ...
  dpkg: error processing archive /tmp/apt-dpkg-install-EiwLtb/12-python3-tables_3.4.2-1_all.deb (--unpack):
   trying to overwrite '/usr/bin/pt2to3', which is also in package python-tables 3.3.0-5
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)


cheers,

Andreas
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