[Python-checkins] gh-93035: [Enum] Fix IntFlag crash when no single-bit members (GH-93076)
ethanfurman
webhook-mailer at python.org
Tue May 24 21:16:38 EDT 2022
https://github.com/python/cpython/commit/08cfc3dabf0f81a4494cd0d697befc7d0dec77b7
commit: 08cfc3dabf0f81a4494cd0d697befc7d0dec77b7
branch: main
author: Tobin Yehle <tobinyehle at gmail.com>
committer: ethanfurman <ethan at stoneleaf.us>
date: 2022-05-24T18:16:20-07:00
summary:
gh-93035: [Enum] Fix IntFlag crash when no single-bit members (GH-93076)
`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).
files:
M Lib/enum.py
diff --git a/Lib/enum.py b/Lib/enum.py
index 64b44197df522..0b97d3d8a68ef 100644
--- a/Lib/enum.py
+++ b/Lib/enum.py
@@ -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
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("""\
Create a collection of name/value pairs.
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