knot has an undeclared file conflict.  This may result in an unpack
error from dpkg.

The file /usr/share/doc/knot/README.md is contained in the packages
 * knot/3.5.6-2 as present in unstable
 * knot-doc/3.5.6-1 as present in forky

These packages can be unpacked concurrently, because there is no
relevant Replaces or Conflicts relation.  Attempting to unpack these
packages concurrently results in an unpack error from dpkg, because none
of the packages installs a diversion for the affected file.

Kind regards

Helmut Grohne

Thanks for looking for and reporting these kind of problems!

Isn't this report a fall-out after fixing
https://bugs.debian.org/1143626 and that everything will be fine as soon
as 3.5.6-2 enters testing?

Mutual installability mixing packages from unstable and testing is not
supported, right?

The 3.5.6-2 version seems to already be in testing, even though the PTS
'news' section doesn't have any entry for testing migration.

Alas, package versioning, file conflicts and upgrade issues usually make
my head hurt, and I wish there were more tooling around to detect and
regression check these issues.  I guess what I'm looking for is a recipe
to reproduce the file conflict error in some supported environment. Or
better: a suggestion how to untangle the situation from where we are
now.

/Simon

Helmut Grohne <helmut@subdivi.de> writes:

Hi Simon,

It is fine if you assume that nobody ever installed knot-doc/3.5.6-1.
However, that version was part of forky. Once 3.5.6-2 migrated, forky
users could run into this upgrade running a testing to testing upgrade
procedure.

It also can be experienced by unstable users upgrading there, but for
unstable users we somewhat expect that users can resolve this (e.g. by
temporarily removing knot-doc).

Technically speaking you're right and this has not been rc bug. It
became an rc bug the exact moment the package migrated to forky. Of
course we would like to not increase the rc bug count in forky. Hence me
filing it as a migration blocker in unstable.

If you were to fix it right now, it would take another two days for the
fix to reach forky. By that time, the majority of users will have
upgraded and run into the bug (if applicable). So it is indeed
questionable whether fixing it now is worth the effort. I argue that it
would have helped if testing migration were prevented. So I leave it up
to you whether to fix or to close without further action.
working on. My filing of these bugs serves a dual purpose. For one
thing, I report bugs, but for another I gain more experience with what
kinds of issues exist. It turns out that a significant fraction of these
issues require further communication (including this one).

A general rule of thumb: If you move a file from one binary package to
a differently named package without changing the name of the file, the
new package has to declare versioned Breaks and Replaces against the old
package. The version should be the first version missing the file in the
old package with a tilde ("~") appended.

Evidently, remembering this rule is difficult when moving a file. Yet,
following it would have prevented both bugs.

Helmut

We believe that the bug you reported is fixed in the latest version of
knot, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1144091@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Simon Josefsson <simon@josefsson.org> (supplier of updated knot package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Fri, 21 Aug 2026 18:50:53 +0200
Source: knot
Architecture: source
Version: 3.5.7-1
Distribution: unstable
Urgency: medium
Maintainer: knot packagers <knot@packages.debian.org>
Changed-By: Simon Josefsson <simon@josefsson.org>
Closes: 1144091
Changes:
 knot (3.5.7-1) unstable; urgency=medium
 .
   * Team upload
   * Run wrap-and-sort -satbk
   * Untangle file conflict mess (Closes: #1144091)
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