attic init kanta.attic

sudo attic create kanta.attic::backup-$(date +%Y-%m-%d) / --do-not-cross-mountpoints
attic: /bin/bash: [Errno 95] Operation not supported: 'kanta.attic/index.tmp'
Traceback (most recent call last):
  File "/usr/bin/attic", line 3, in <module>
    main()
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 715, in main
    exit_code = archiver.run(sys.argv[1:])
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 705, in run
    return args.func(args)
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 128, in do_create
    self._process(archive, cache, args.excludes, args.exclude_caches, skip_inodes, path, restrict_dev)
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 177, in _process
    os.path.join(path, filename), restrict_dev)
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 177, in _process
    os.path.join(path, filename), restrict_dev)
  File "/usr/lib/python3/dist-packages/attic/archiver.py", line 163, in _process
    archive.process_file(path, st, cache)
  File "/usr/lib/python3/dist-packages/attic/archive.py", line 402, in process_file
    chunks.append(cache.add_chunk(self.key.id_hash(chunk), chunk, self.stats))
  File "/usr/lib/python3/dist-packages/attic/cache.py", line 180, in add_chunk
    self.repository.put(id, data, wait=False)
  File "/usr/lib/python3/dist-packages/attic/repository.py", line 360, in put
    self.segments.setdefault(segment, 0)
AttributeError: 'Repository' object has no attribute 'segments'