Bugfix and robustness in branch closing
This brings in a fix for one of the case of heptapod#452 (closed) and hopefully unblocks the other ones while providing useful tracebacks.
This instance will be upgraded to Heptapod 1.3.3 (GitLab 16.9.6) on 2023-04-25 at 18:00 UTC+2
This brings in a fix for one of the case of heptapod#452 (closed) and hopefully unblocks the other ones while providing useful tracebacks.