[rdiff-backup-users] Exception '' raised of class '<type 'exceptions.AssertionError'> when backing up to vboxsf mount

[Marcin Szymański]

Hello,

I'm trying to backup virtual machine's contents to an NTFS drive mounted
over Virtualbox shared folders feature. When I try doing that I get an
error: Exception '' raised of class '<type 'exceptions.AssertionError'>.

Traceback:

Sun Sep 15 01:29:03 2019  Using rdiff-backup version 1.2.8
Sun Sep 15 01:29:03 2019  Found interrupted initial backup. Removing...
Sun Sep 15 01:29:03 2019  Unable to import win32security module. Windows
ACLs
not supported by filesystem at /
Sun Sep 15 01:29:03 2019  escape_dos_devices not required by filesystem at /
Sun Sep 15 01:29:03 2019 
-----------------------------------------------------------------
Detected abilities for source (read only) file system:
  Access control lists                         On
  Extended attributes                          On
  Windows access control lists                 Off
  Case sensitivity                             On
  Escape DOS devices                           Off
  Escape trailing spaces                       Off
  Mac OS X style resource forks                Off
  Mac OS X Finder information                  Off
-----------------------------------------------------------------
Sun Sep 15 01:29:03 2019  Making directory
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2
Sun Sep 15 01:29:03 2019  Touching
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/5-_ a.snapshot.gz
Sun Sep 15 01:29:03 2019  Deleting
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/5-_ a.snapshot.gz
Sun Sep 15 01:29:03 2019  Touching
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/uniᄉ
Sun Sep 15 01:29:03 2019  Deleting
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/uniᄉ
Sun Sep 15 01:29:03 2019  Touching
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/:\"
Sun Sep 15 01:29:03 2019  Touching
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/A
Sun Sep 15 01:29:03 2019  Deleting
/mnt/backup/rdiff-backup-data/rdiff-backup.tmp.2/a
Sun Sep 15 01:29:03 2019  Exception '' raised of class '<type
'exceptions.AssertionError'>':
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
304, in error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
324, in Main
    take_action(rps)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
280, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
334, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 922, in backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 156, in init_readwrite
    self.set_case_sensitive_readwrite(subdir)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 304, in set_case_sensitive_readwrite
    assert not upper_a.lstat()

Traceback (most recent call last):
  File "/usr/bin/rdiff-backup", line 30, in <module>
    rdiff_backup.Main.error_check_Main(sys.argv[1:])
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
304, in error_check_Main
    try: Main(arglist)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
324, in Main
    take_action(rps)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
280, in take_action
    elif action == "backup": Backup(rps[0], rps[1])
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/Main.py", line
334, in Backup
    rpout.conn.fs_abilities.backup_set_globals(rpin, force)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 922, in backup_set_globals
    dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 156, in init_readwrite
    self.set_case_sensitive_readwrite(subdir)
  File "/usr/lib/python2.7/dist-packages/rdiff_backup/fs_abilities.py",
line 304, in set_case_sensitive_readwrite
    assert not upper_a.lstat()
AssertionError

Is this a bug or am I doing this wrong?

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