Starting docstring starting with "<word>:" raises error

[cfrings]

When processing following file:

class A:

    def __init__(self, x, y):
        """Arguments:
            x - is x
            y - is obviously y
        """
        pass

I get an error:

Traceback (most recent call last):
  File "e:\python34(86)\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "e:\python34(86)\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "E:\Python34(86)\Scripts\doxypypy.exe\__main__.py", line 9, in 
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 874, in main
    astWalker.parseLines()
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 757, in parseLines
    self.visit(inAst)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 603, in visit_Module
    self.generic_visit(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 558, in generic_visit
    self.visit(item, containingNodes=kwargs['containingNodes'])
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 749, in visit_ClassDef
    self.generic_visit(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 558, in generic_visit
    self.visit(item, containingNodes=kwargs['containingNodes'])
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 690, in visit_FunctionDef
    containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 429, in _processDocstring
    docstringConverter.send(lineInfo)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 248, in __alterDocstring
    lines[-1], inCodeBlock)
IndexError: list index out of range

If Arguments is replaced with another, non-significant, word (e.g. Lemon), another error is raised:

Traceback (most recent call last):
  File "e:\python34(86)\lib\runpy.py", line 170, in _run_module_as_main
    "__main__", mod_spec)
  File "e:\python34(86)\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "E:\Python34(86)\Scripts\doxypypy.exe\__main__.py", line 9, in 
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 874, in main
    astWalker.parseLines()
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 757, in parseLines
    self.visit(inAst)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 603, in visit_Module
    self.generic_visit(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 558, in generic_visit
    self.visit(item, containingNodes=kwargs['containingNodes'])
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 749, in visit_ClassDef
    self.generic_visit(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 558, in generic_visit
    self.visit(item, containingNodes=kwargs['containingNodes'])
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 573, in visit
    return visitor(node, containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 690, in visit_FunctionDef
    containingNodes=containingNodes)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 429, in _processDocstring
    docstringConverter.send(lineInfo)
  File "e:\python34(86)\lib\site-packages\doxypypy\doxypypy.py", line 310, in __alterDocstring
    if lines[-1] == '# @par':

Errors disappear if : is removed from the first line.