leapp fails on the check_bind actor with `IndexError: string index out of range`

Issue

leapp upgrade fails during the check_bind actor

2024-03-21 11:24:52.976 ERROR    PID: 57439 leapp.workflow.Checks: Actor check_bind has crashed: Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 74, in _do_run
    actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 289, in run
    self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/checkbind/actor.py", line 32, in process
    facts = iscmodel.get_facts('/etc/named.conf')
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/checkbind/libraries/iscmodel.py", line 81, in get_facts
    parser.walk(cfg.root_section(), find_calls, state)
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/libraries/isccfg.py", line 879, in walk
    for statement in it:
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/libraries/isccfg.py", line 223, in __next__
    statement = next(self.iter)
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/libraries/isccfg.py", line 181, in __next__
    val = self.parser.find_next_key(cfg, index, self.section.end)
  File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/libraries/isccfg.py", line 689, in find_next_key
    while istr[index] in self.CHAR_KEYWORD and index < end_index:
IndexError: string index out of range