Undocumented feature prevents re module from finding certain matches

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Quiet
Tech stack
python
Domain
backend

Research direction

Start with the linked BPO issue 23692 and its discussion; it is marked “needs patch” and “expert-regex,” but names no source file or test. Locate the re regular-expression implementation and establish the intended matching behavior before adding focused regression coverage; done should address the reported matches and clarify the undocumented behavior.

Written by the indexing model from the issue text.

Description

3.13 3.14 3.15 topic-regex type-bug
BPO 23692
Nosy @ezio-melotti, @serhiy-storchaka, @animalize, @LewisGaul, @jacksonriley

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 2015-03-17.18:49:44.539>
labels = ['expert-regex', 'type-bug', '3.7']
title = 'Undocumented feature prevents re module from finding certain matches'
updated_at = <Date 2019-11-12.10:33:07.346>
user = 'https://bugs.python.org/abacabadabacaba'

bugs.python.org fields:

activity = <Date 2019-11-12.10:33:07.346>
actor = 'jacksonriley'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Regular Expressions']
creation = <Date 2015-03-17.18:49:44.539>
creator = 'abacabadabacaba'
dependencies = []
files = []
hgrepos = []
issue_num = 23692
keywords = []
message_count = 10.0
messages = ['238330', '355471', '355493', '355646', '355950', '355953', '355955', '355982', '355989', '356435']
nosy_count = 7.0
nosy_names = ['ezio.melotti', 'mrabarnett', 'abacabadabacaba', 'serhiy.storchaka', 'malin', 'LewisGaul', 'jacksonriley']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue23692'
versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7']

Dominant language
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