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gh-93035: [Enum] Fix IntFlag crash when no single-bit members (GH-93076)

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`EnumType` attempts to create a custom docstring for each enum/flag, but that was failing with pathological flags that had no members (only multi-bit aliases).
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Tobin Yehle 2022-05-24 19:16:20 -06:00 • committed by GitHub
parent 4a31ed8a32
commit 08cfc3dabf
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Lib/enum.py
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@ -538,7 +538,7 @@ def __new__(metacls, cls, bases, classdict, *, boundary=None, _simple=False, **k
# #
# create a default docstring if one has not been provided # create a default docstring if one has not been provided
if enum_class.__doc__ is None: if enum_class.__doc__ is None:
if not member_names: if not member_names or not list(enum_class):
enum_class.__doc__ = classdict['__doc__'] = _dedent("""\ enum_class.__doc__ = classdict['__doc__'] = _dedent("""\
Create a collection of name/value pairs. Create a collection of name/value pairs.