mock 0.8 beta1 bug

gistfile1.txt

# Old version:
>>> from mock import MagicMock
>>> a = MagicMock()
>>> a.foo("hello")
<mock.MagicMock object at 0xa40cecc>
>>> a.foo("goodbye")
<mock.MagicMock object at 0xa40cecc>
>>> a.foo.call_args_list
[(('hello',), {}), (('goodbye',), {})]
>>> a.foo.call_args_list[0]
(('hello',), {})
>>> a.foo.call_args_list[0][0]
('hello',)                                                                                                                                                                                    
>>> a.foo.call_args_list[0][0][0]
'hello'                                                                                                                                                                      
                 
# New version:
>>> from mock import MagicMock                                                                                                                                                                
>>> a = MagicMock()                                                                                                                                                                           
>>> a.foo("hello")
<mock.MagicMock object at 0x9f704ec>
>>> a.foo("goodbye")
<mock.MagicMock object at 0x9f704ec>
>>> a.foo.call_args_list
[(('hello',), {}), (('goodbye',), {})]
>>> a.foo.call_args_list[0]
(('hello',), {})
>>> a.foo.call_args_list[0][0]
''
>>> a.foo.call_args_list[0][0][0]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: string index out of range