Bug: Backup to exFAT volume seems to fail due to case-sensitivity

Hi,


So I tried something... tried to back up from an ext4 filesystem to
exFAT. rsync works without any problems.


With the best regards,


David


david@nitro ~> uname -a
Linux nitro 5.3.0-46-generic #38-Ubuntu SMP Fri Mar 27 17:37:05 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux

david@nitro ~> sudo rdiff-backup -v 5 --force /home/
/media/david/Backup\ SSD/Nitro/home/
Using rdiff-backup version 1.9.0b0
     with cpython /usr/bin/python3 version 3.7.5
     on Linux-5.3.0-46-generic-x86_64-with-Ubuntu-19.10-eoan, fs
encoding utf-8
Unable to import win32security module. Windows ACLs
not supported by filesystem at /home
-----------------------------------------------------------------
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
-----------------------------------------------------------------
Exception '' raised of class '<class 'AssertionError'>':
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 390, in error_check_Main
     Main(arglist)
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 412, in Main
     take_action(rps)
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 348, in take_action
     Backup(rps[0], rps[1])
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 424, in Backup
     rpout.conn.fs_abilities.backup_set_globals(rpin, force)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 1044, in backup_set_globals
     dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 159, in init_readwrite
     self.set_case_sensitive_readwrite(subdir)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 325, in set_case_sensitive_readwrite
     assert not upper_a.lstat()

Traceback (most recent call last):
   File "/usr/local/bin/rdiff-backup", line 32, in <module>
     rdiff_backup.Main.error_check_Main(sys.argv[1:])
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 390, in error_check_Main
     Main(arglist)
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 412, in Main
     take_action(rps)
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 348, in take_action
     Backup(rps[0], rps[1])
   File "/usr/local/lib/python3.7/dist-packages/rdiff_backup/Main.py",
line 424, in Backup
     rpout.conn.fs_abilities.backup_set_globals(rpin, force)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 1044, in backup_set_globals
     dest_fsa = FSAbilities('destination').init_readwrite(Globals.rbdir)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 159, in init_readwrite
     self.set_case_sensitive_readwrite(subdir)
   File
"/usr/local/lib/python3.7/dist-packages/rdiff_backup/fs_abilities.py",
line 325, in set_case_sensitive_readwrite
     assert not upper_a.lstat()
AssertionError