Encoding str to IDNA with ellipsis decomposes to empty labels

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
internationalization

Research direction

Start by reproducing the reported IDNA encoding behavior for a string containing an ellipsis, then trace the Python standard-library path that performs the encoding and label decomposition. Compare the result with the expected handling of labels, and add or update a focused regression test once the relevant module is identified.

Written by the indexing model from the issue text.

Description

stdlib type-bug
BPO 21103
Nosy @loewis, @bitdancer

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 = None
created_at = <Date 2014-03-30.17:57:53.183>
labels = ['type-bug', 'library']
title = 'Encoding str to IDNA with ellipsis decomposes to empty labels'
updated_at = <Date 2014-03-30.20:50:37.119>
user = 'https://bugs.python.org/chfoo'

bugs.python.org fields:

activity = <Date 2014-03-30.20:50:37.119>
actor = 'r.david.murray'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2014-03-30.17:57:53.183>
creator = 'chfoo'
dependencies = []
files = []
hgrepos = []
issue_num = 21103
keywords = []
message_count = 3.0
messages = ['215189', '215198', '215199']
nosy_count = 3.0
nosy_names = ['loewis', 'r.david.murray', 'chfoo']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue21103'
versions = []

Dominant language
Python
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Merged PRs (30d)
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