pythoscope crash on test generation

I'm trying pythoscope on iTrade to get the hang of both.
While pythoscope starts generating tests, it seems to go fine for a while, then it crashes when it reaches a specific module.
Removing the module fixes the crash.

cd project
pythoscope --init
pythoscope *.py

ERROR: Oops, it seems internal Pythoscope error occured. Please file a bug report at https://bugs.launchpad.net/pythoscope

Traceback (most recent call last):
  File "C:\Python25\Scripts\pythoscope-script.py", line 8, in <module>
    load_entry_point('pythoscope==0.4', 'console_scripts', 'pythoscope')()
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\__init__.py", line 182, in main
    generate_tests(args, force, template)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\__init__.py", line 111, in generate_tests
    add_tests_to_project(project, modules, template, force)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 837, in add_tests_to_project
    generator.add_tests_to_project(project, modnames, force)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 580, in add_tests_to_project
    self._add_tests_for_module(module, project, force)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 608, in _add_tests_for_module
    for test_case in self._generate_test_cases(module):
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 613, in _generate_test_cases
    test_case = self._generate_test_case(object, module)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 619, in _generate_test_case
    method_descriptions = sorted_test_method_descriptions(self._generate_test_method_descriptions(object, module))
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 448, in sorted_test_method_descriptions
    return sorted(descriptions, key=lambda md: md.name)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 674, in _generate_test_method_descriptions_for_class
    yield self._generate_test_method_description_for_method(klass, method)
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 684, in _generate_test_method_description_for_method
    method.get_call_args()))
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 474, in assertion_stub
    return ('equal_stub', 'expected', call_with_args(callable, args))
  File "c:\python25\lib\site-packages\pythoscope-0.4-py2.5.egg\pythoscope\generator\__init__.py", line 468, in call_with_args
    return "%s(%s)" % (callable, ', '.join(args))
TypeError: sequence item 0: expected string, tuple found