[2021-06-03 08:56:43] Running ['new-upstream', '--debian-revision=0kali1', '--require-uscan', '--refresh-patches']
[2021-06-03 08:56:43] Opening branch at https://gitlab.com/kalilinux/packages/nipper-ng.git/,branch=kali%2Fmaster
[2021-06-03 08:56:43] Using cached branch https://janitor.kali.org/git/nipper-ng/,branch=kali%2Flatest
[2021-06-03 08:56:44] Total 307 (delta 15), reused 292 (delta 0)
[2021-06-03 08:56:46] Total 5 (delta 0), reused 5 (delta 0)
[2021-06-03 08:56:48] Total 3 (delta 0), reused 2 (delta 0), pack-reused 0
[2021-06-03 08:56:48] Workspace ready - starting.
[2021-06-03 08:56:48] Using upstream branch https://janitor.kali.org/git/nipper-ng/ (guessed)
Traceback (most recent call last):
  File "/opt/debian-janitor/janitor/pull_worker.py", line 232, in run_worker
    possible_transports=possible_transports,
  File "/usr/lib/python3.7/contextlib.py", line 112, in __enter__
    return next(self.gen)
  File "/opt/debian-janitor/janitor/worker.py", line 791, in process_package
    committer=committer
  File "/opt/debian-janitor/janitor/worker.py", line 468, in make_changes
    reporter=reporter,
  File "/opt/debian-janitor/janitor/worker.py", line 170, in make_changes
    return super(NewUpstreamChanger, self).make_changes(local_tree, subpath, *args, **kwargs)
  File "/opt/debian-janitor/silver-platter/silver_platter/debian/upstream.py", line 1279, in make_changes
    require_uscan=self.require_uscan,
  File "/opt/debian-janitor/silver-platter/silver_platter/debian/upstream.py", line 915, in merge_upstream
    require_uscan=require_uscan,
  File "/opt/debian-janitor/silver-platter/silver_platter/debian/upstream.py", line 545, in find_new_upstream
    package, old_upstream_version
TypeError: cannot unpack non-iterable NoneType object