ValueError exception raised when using IntEnum with an attribute called "name" and @unique decorator

[JulienEnche]

BPO	26893
Nosy	@warsaw, @ethanfurman, @berkerpeksag, @zhangyangyu
Files	enumtest.py

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/ethanfurman'
closed_at = <Date 2016-05-04.20:27:04.608>
created_at = <Date 2016-04-30.12:35:25.970>
labels = ['type-bug', 'library']
title = 'ValueError exception raised when using IntEnum with an attribute called "name" and @unique decorator'
updated_at = <Date 2016-05-04.20:27:04.607>
user = 'https://bugs.python.org/JulienEnche'

bugs.python.org fields:

activity = <Date 2016-05-04.20:27:04.607>
actor = 'berker.peksag'
assignee = 'ethan.furman'
closed = True
closed_date = <Date 2016-05-04.20:27:04.608>
closer = 'berker.peksag'
components = ['Library (Lib)']
creation = <Date 2016-04-30.12:35:25.970>
creator = 'Julien Enche'
dependencies = []
files = ['42664']
hgrepos = []
issue_num = 26893
keywords = ['3.5regression']
message_count = 4.0
messages = ['264554', '264555', '264568', '264600']
nosy_count = 7.0
nosy_names = ['barry', 'eli.bendersky', 'ethan.furman', 'python-dev', 'berker.peksag', 'xiang.zhang', 'Julien Enche']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue26893'
versions = ['Python 3.5', 'Python 3.6']

[JulienEnche]

The linked file fails with the following error :
ValueError: duplicate values found in <enum 'User'>: id -> User.name, name -> User.name

This exception was not raised with Python 3.4.

[berkerpeksag]

Looks like 2545bfe0d273 (bpo-23486) is the culprit.

[ethanfurman]

Thanks for catching that.

[python-dev]

New changeset 1b6581bae5a1 by Ethan Furman in branch '3.5':
bpo-26893: use mro() to examine class heirarchy
https://hg.python.org/cpython/rev/1b6581bae5a1

New changeset 7188de6b50ab by Ethan Furman in branch 'default':
bpo-26893: use mro() to examine class heirarchy
https://hg.python.org/cpython/rev/7188de6b50ab