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Fix py3.6b3 crashes with empty Callable annotation

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This commit is contained in:
Takeshi KOMIYA 2016-11-03 10:00:35 +09:00
parent 07caa321d3
commit 7a6f2ae894
1 changed files with 1 additions and 1 deletions
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2
sphinx/ext/autodoc.py
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@ -293,7 +293,7 @@ def format_annotation(annotation):
# arguments are in __parameters__.
params = None
if hasattr(annotation, '__args__'):
if len(annotation.__args__) <= 2:
if annotation.__args__ is None or len(annotation.__args__) <= 2:
params = annotation.__args__
else: # typing.Callable
args = ', '.join(format_annotation(a) for a in annotation.__args__[:-1])