In regex pattern long unicode character isn't recognized by repetition characters +, * and {}

[py-user]

BPO	14045
Nosy	@loewis, @vstinner, @ezio-melotti, @py-user

^{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 2012-02-18.03:53:35.399>
created_at = <Date 2012-02-18.03:13:37.675>
labels = ['expert-regex', 'type-bug', 'library']
title = "In regex pattern long unicode character isn't recognized by repetition characters +, * and {}"
updated_at = <Date 2012-02-18.03:53:35.397>
user = 'https://github.com/py-user'

bugs.python.org fields:

activity = <Date 2012-02-18.03:53:35.397>
actor = 'loewis'
assignee = 'none'
closed = True
closed_date = <Date 2012-02-18.03:53:35.399>
closer = 'loewis'
components = ['Library (Lib)', 'Regular Expressions']
creation = <Date 2012-02-18.03:13:37.675>
creator = 'py.user'
dependencies = []
files = []
hgrepos = []
issue_num = 14045
keywords = []
message_count = 3.0
messages = ['153629', '153630', '153631']
nosy_count = 4.0
nosy_names = ['loewis', 'vstinner', 'ezio.melotti', 'py.user']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue14045'
versions = ['Python 3.2']

[py-user]

>>> import re
>>> '\U00000061'
'a'
>>> '\U00100061'
'\U00100061'
>>> re.search('\U00100061', '\U00100061' * 10).group()
'\U00100061'
>>> re.search('\U00100061+', '\U00100061' * 10).group()
'\U00100061'
>>> re.search('(\U00100061)+', '\U00100061' * 10).group()
'\U00100061\U00100061\U00100061\U00100061\U00100061\U00100061\U00100061\U00100061\U00100061\U00100061'
>>> 
>>>
>>> re.search('\U00100061{3}', '\U00100061' * 10)
>>> re.search('(\U00100061){3}', '\U00100061' * 10).group()
'\U00100061\U00100061\U00100061'
>>>

[vstinner]

The re module doesn't support non-BMP characters in Python 3.2 compiled in narrow mode (sys.maxunicode==65535). This issue is already fixed in Python 3.3 which doesn't have narrow or wide mode anymore thanks to the PEP-393!

[loewis]

As Victor says, this issue is fixed in Python 3.3.