aa-logprof crashes when answering questions

AttributeError
Python 3.5.2: /usr/bin/python3
Fri Mar 3 02:11:06 2017

A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.

 /usr/sbin/aa-logprof in <module>()
   42
   43 if profiledir:
   44 apparmor.profile_dir = apparmor.get_full_path(profiledir)
   45 if not os.path.isdir(apparmor.profile_dir):
   46 raise apparmor.AppArmorException("%s is not a directory."%profiledir)
   47
   48 apparmor.loadincludes()
   49
   50 apparmor.do_logprof_pass(logmark)
   51
apparmor = <module 'apparmor.aa' from '/usr/lib/python3/dist-packages/apparmor/aa.py'>
apparmor.do_logprof_pass = <function do_logprof_pass>
logmark = ''

 /usr/lib/python3/dist-packages/apparmor/aa.py in do_logprof_pass(logmark='', passno=0, pid=30617)
 2197 for pid in sorted(profile_changes.keys()):
 2198 set_process(pid, profile_changes[pid])
 2199
 2200 collapse_log()
 2201
 2202 ask_the_questions()
 2203
 2204 if aaui.UI_mode == 'yast':
 2205 # To-Do
 2206 pass
global ask_the_questions = <function ask_the_questions>

 /usr/lib/python3/dist-packages/apparmor/aa.py in ask_the_questions()
 1688 aaui.UI_Info(_('Adding %s to profile.') % selection)
 1689 if deleted:
 1690 aaui.UI_Info(_('Deleted %s previous matching profile entries.') % deleted)
 1691
 1692 else:
 1693 aa[profile][hat][ruletype].add(rule_obj)
 1694
 1695 aaui.UI_Info(_('Adding %s to profile.') % rule_obj.get_clean())
 1696
 1697 elif ans == 'CMD_DENY':
global aa = defaultdict(<function hasher at 0x7f662dd07048>,...ct(<function hasher at 0x7f662dd07048>, {})})})})
profile = '/bin/su'
hat = 'DEFAULT'
ruletype = 'ptrace'
].add undefined
rule_obj = <PtraceRule> ptrace trace peer=unconfined,
AttributeError: 'collections.defaultdict' object has no attribute 'add'
    __cause__ = None
    __class__ = <class 'AttributeError'>
    __context__ = None
    __delattr__ = <method-wrapper '__delattr__' of AttributeError object>
    __dict__ = {}
    __dir__ = <built-in method __dir__ of AttributeError object>
    __doc__ = 'Attribute not found.'
    __eq__ = <method-wrapper '__eq__' of AttributeError object>
    __format__ = <built-in method __format__ of AttributeError object>
    __ge__ = <method-wrapper '__ge__' of AttributeError object>
    __getattribute__ = <method-wrapper '__getattribute__' of AttributeError object>
    __gt__ = <method-wrapper '__gt__' of AttributeError object>
    __hash__ = <method-wrapper '__hash__' of AttributeError object>
    __init__ = <method-wrapper '__init__' of AttributeError object>
    __le__ = <method-wrapper '__le__' of AttributeError object>
    __lt__ = <method-wrapper '__lt__' of AttributeError object>
    __ne__ = <method-wrapper '__ne__' of AttributeError object>
    __new__ = <built-in method __new__ of type object>
    __reduce__ = <built-in method __reduce__ of AttributeError object>
    __reduce_ex__ = <built-in method __reduce_ex__ of AttributeError object>
    __repr__ = <method-wrapper '__repr__' of AttributeError object>
    __setattr__ = <method-wrapper '__setattr__' of AttributeError object>
    __setstate__ = <built-in method __setstate__ of AttributeError object>
    __sizeof__ = <built-in method __sizeof__ of AttributeError object>
    __str__ = <method-wrapper '__str__' of AttributeError object>
    __subclasshook__ = <built-in method __subclasshook__ of type object>
    __suppress_context__ = False
    __traceback__ = <traceback object>
    args = ("'collections.defaultdict' object has no attribute 'add'",)
    with_traceback = <built-in method with_traceback of AttributeError object>

The above is a description of an error in a Python program. Here is
the original traceback:

Traceback (most recent call last):
  File "/usr/sbin/aa-logprof", line 50, in <module>
    apparmor.do_logprof_pass(logmark)
  File "/usr/lib/python3/dist-packages/apparmor/aa.py", line 2202, in do_logprof_pass
    ask_the_questions()
  File "/usr/lib/python3/dist-packages/apparmor/aa.py", line 1693, in ask_the_questions
    aa[profile][hat][ruletype].add(rule_obj)
AttributeError: 'collections.defaultdict' object has no attribute 'add'