Opened 4 weeks ago

#29899 new defect

Descriptor exit_policy can raise TypeError?

Reported by: juga Owned by: atagar
Priority: Medium Milestone:
Component: Core Tor/Stem Version:
Severity: Normal Keywords:
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


In sbws we got this traceback:

  File "/usr/lib/python3/dist-packages/sbws/lib/", line 117, in can_exit_to_port
     if not self.exit_policy:
  File "/usr/lib/python3/dist-packages/stem/", line 512, in __len__  # noqa
    return len(self._get_rules())
  File "/usr/lib/python3/dist-packages/stem/", line 464, in _get_rules  # noqa
    for rule in decompressed_rules:
TypeError: 'NoneType' object is not iterable

I'm a bit confused on what triggers that, because looking at stem code, it does not seem that __init__ calls _get_rules, but this seems to happen when just getting the exit_policy attribute in sbws:

In the moment _get_rules is call, this might happen because it is not check that _input_rules is not None:

Should also _input_rules be assigned [] instead of None in

Child Tickets

Change History (0)

Note: See TracTickets for help on using tickets.