Why does leapp preupgrade actor for xfs_info_scanner fails with UnicodeEncodeError error ?

Issue

• The leapp preupgrade command fails with the below error for xfs_info_scanner actor

  ====> * xfs_info_scanner
          This actor scans all mounted mountpoints for XFS information
  Process Process-203:
  Traceback (most recent call last):
    File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
      self.run()
    File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
      self._target(*self._args, **self._kwargs)
    File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 72, in _do_run
      actor_instance.run(*args, **kwargs)
    File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 335, in run
      self.process(*args)
    File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/xfsinfoscanner/actor.py", line 23, in process
      scan_xfs()
    File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/xfsinfoscanner/libraries/xfsinfoscanner.py", line 56, in scan_xfs
      mountpoints_ftype0 = list(filter(is_xfs_without_ftype, mountpoints))
    File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/xfsinfoscanner/libraries/xfsinfoscanner.py", line 33, in is_xfs_without_ftype
      for l in run(['/usr/sbin/xfs_info', '{}'.format(mp)], split=True)['stdout']:
  UnicodeEncodeError: 'ascii' codec can't encode characters in position 9-11: ordinal not in range(128)
  
  
  =================================================================================================
  Actor xfs_info_scanner unexpectedly terminated with exit code: 1 - Please check the above details
  =================================================================================================