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Bug#977408: libstdc++-11-doc: missing Conflicts: libstdc++-10-doc



Package: libstdc++-11-doc
Version: 11-20201208-1
Severity: serious
User: debian-qa@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/ch-relationships.html#overwriting-files-and-replacing-packages-replaces

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

  Preparing to unpack .../libstdc++-11-doc_11-20201208-1_all.deb ...
  Unpacking libstdc++-11-doc (11-20201208-1) ...
  dpkg: error processing archive /var/cache/apt/archives/libstdc++-11-doc_11-20201208-1_all.deb (--unpack):
   trying to overwrite '/usr/share/man/man3/C++Intro.3cxx.gz', which is also in package libstdc++-10-doc 10.2.1-1
  dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
  Errors were encountered while processing:
   /var/cache/apt/archives/libstdc++-11-doc_11-20201208-1_all.deb

You should consider adding Conflicts+Replaces+Provides on some (internally
used) virtual package to avoid running into this problem again in the
future.


cheers,

Andreas

Attachment: libstdc++-10-doc=10.2.1-1_libstdc++-11-doc=11-20201208-1.log.gz
Description: application/gzip


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