re.match loops forever on simple regexp

lpd

BPO	16563
Nosy	@tim-one, @mdickinson, @ezio-melotti
Superseder	bpo-1662581: the re module can perform poorly: O(2n) versus O(n2)

^{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 2012-11-27.08:45:44.639>
created_at = <Date 2012-11-27.00:07:43.246>
labels = ['expert-regex', 'type-crash']
title = 're.match loops forever on simple regexp'
updated_at = <Date 2012-11-27.08:58:46.617>
user = 'https://bugs.python.org/lpd'

bugs.python.org fields:

activity = <Date 2012-11-27.08:58:46.617>
actor = 'mark.dickinson'
assignee = 'none'
closed = True
closed_date = <Date 2012-11-27.08:45:44.639>
closer = 'mark.dickinson'
components = ['Regular Expressions']
creation = <Date 2012-11-27.00:07:43.246>
creator = 'lpd'
dependencies = []
files = []
hgrepos = []
issue_num = 16563
keywords = []
message_count = 7.0
messages = ['176458', '176459', '176460', '176461', '176465', '176466', '176469']
nosy_count = 5.0
nosy_names = ['tim.peters', 'lpd', 'mark.dickinson', 'ezio.melotti', 'mrabarnett']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = '1662581'
type = 'crash'
url = 'https://bugs.python.org/issue16563'
versions = ['Python 2.6']