Email parser creates a message object that can't be flattened #71508
Description
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 = None
closed_at = <Date 2020-10-19.23:02:01.155>
created_at = <Date 2016-06-14.18:52:52.474>
labels = ['type-bug', '3.8', 'expert-email', '3.10', '3.9']
title = "Email parser creates a message object that can't be flattened"
updated_at = <Date 2020-10-19.23:11:42.432>
user = 'https://github.com/msapiro'bugs.python.org fields:
activity = <Date 2020-10-19.23:11:42.432>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2020-10-19.23:02:01.155>
closer = 'barry'
components = ['email']
creation = <Date 2016-06-14.18:52:52.474>
creator = 'msapiro'
dependencies = []
files = ['43391', '43394']
hgrepos = []
issue_num = 27321
keywords = ['patch']
message_count = 22.0
messages = ['268580', '268589', '279172', '295080', '295093', '295101', '295105', '295107', '295108', '295430', '295442', '295443', '296293', '310513', '311272', '327136', '336930', '378083', '378088', '379052', '379056', '379057']
nosy_count = 10.0
nosy_names = ['barry', 'msapiro', 'diekhans', 'r.david.murray', 'maciej.szulik', 'matrixise', 'cheryl.sabella', 'Johannes L\xc3\xb6thberg', 'miss-islington', 'edeca']
pr_nums = ['1977', '18074', '22796', '22797']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue27321'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']