An update. The problem was solved by purging (apt-get purge sgf2dg) and reinstalling the package. There must have been something bad in my installation. I do not know what that was because I have not consciously changed or played with any components of sgf2dg.
The lesson is to try a purge and reinstall before making another bug report. Thanks, John Green. On Mon, 05 Apr 2021 09:10:59 +0100 John Green <gree...@hotmail.com> wrote: > Package: sgf2dg > Version: 4.252-1 > Severity: important > X-Debbugs-Cc: gree...@hotmail.com > > Dear Maintainer, > > *** Reporter, please consider answering these questions, where appropriate *** > > * What led up to the situation? > * What exactly did you do (or not do) that was effective (or > ineffective)? > * What was the outcome of this action? > * What outcome did you expect instead? > > *** End of the template - remove these template lines *** > > The sgf2dg program fails to start. It reports an error message that > begins as follows. > > Can't locate Games/Go/Diagram.pm in @INC (you may need to install the Games::Go::Diagram module) > > The error message ends as follows. > > BEGIN failed--compilation aborted at /usr/bin/sgf2dg line 53. > > This issue did not occur on Debian 10. I do not know perl, so cannot > investigate or fix the problem myself. > > -- System Information: > Debian Release: bullseye/sid > APT prefers testing-security > APT policy: (500, 'testing-security'), (500, 'testing') > Architecture: amd64 (x86_64) > > Kernel: Linux 5.10.27 (SMP w/4 CPU threads) > Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE > Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB:en > Shell: /bin/sh linked to /usr/bin/dash > Init: systemd (via /run/systemd/system) > LSM: AppArmor: enabled > > Versions of packages sgf2dg depends on: > ii libc6 2.31-11 > ii perl 5.32.1-3 > > Versions of packages sgf2dg recommends: > ii libpdf-create-perl 1.46-1 > ii libpostscript-file-perl 2.23+dfsg-1 > > sgf2dg suggests no packages. > > -- no debconf information > >