I made a stupid and forgot to include Priority in debian/control. That lead to
a cryptic "Internal call failed" after the package built completely fine. I was
then mislead by "E: ? reprepro.. (stderr): Could not check validity of
signature with '{my key ID}' in '{path to source DSC}' as public key missing!"
and didn't realise that "No priority for '{package name}', skipping." (which
sounded less serious) was the real error and meant that the Priority field was
missing in the source control file until I enabled debug logging, uploaded
another package that installed without error, and saw that the signature
validation failure was normal.

Would it be possible to detect the missing Priority (and possibly other
problems that don't prevent the build but the installation into the
repository) and reject the upload? Maybe it's only a problem if the package is
new?

See also Bug #1125005

I don't think it make sense to check for this field in mini-buildd
anymore since the field itself has become optional. The underlying
problem seems to be that reprepro still requires this field while it
defaults are not needed by the Debian Policy.

We believe that the bug you reported is fixed in the latest version of
mini-buildd, 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 1106857@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Stephan Sürken <absurd@debian.org> (supplier of updated mini-buildd 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: Sat, 29 Aug 2026 14:51:35 +0200
Source: mini-buildd
Architecture: source
Version: 2.4.10
Distribution: unstable
Urgency: medium
Maintainer: Stephan Sürken <absurd@debian.org>
Changed-By: Stephan Sürken <absurd@debian.org>
Closes: 1106857
Changes:
 mini-buildd (2.4.10) unstable; urgency=medium
 .
   * [b581e2e] reprepro.py (install_dsc): Workaround for installing DSC w/o
     explicit 'Priority' (Closes: 1106857)
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