bug fix 702858: deepcopying reflexive objects

[staschuk]

BPO	707900
Nosy	@gvanrossum, @tim-one
Files	deepcopy-reflexive-object.patch

^{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 2005-01-09.17:09:17.000>
created_at = <Date 2003-03-22.04:08:59.000>
labels = ['library']
title = 'bug fix 702858: deepcopying reflexive objects'
updated_at = <Date 2005-01-09.17:09:17.000>
user = 'https://bugs.python.org/staschuk'

bugs.python.org fields:

activity = <Date 2005-01-09.17:09:17.000>
actor = 'jlgijsbers'
assignee = 'nnorwitz'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2003-03-22.04:08:59.000>
creator = 'staschuk'
dependencies = []
files = ['5112']
hgrepos = []
issue_num = 707900
keywords = ['patch']
message_count = 7.0
messages = ['43106', '43107', '43108', '43109', '43110', '43111', '43112']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'tim.peters', 'nnorwitz', 'jlgijsbers', 'staschuk']
pr_nums = []
priority = 'normal'
resolution = 'out of date'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue707900'
versions = ['Python 2.2']

[staschuk]

A fix for bug 702858, which concerns the inability of
copy.deepcopy to correctly process reflexive
new-style class instances, that is, instances referring
to themselves.

The fix is one line; the other 51 lines in the patch
are altered and enhanced altered tests in
test_copy.py for this kind of thing.

[nnorwitz]

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This patch works on 2.3. I'm not sure if this is fixing a
bug or a feature. The change seems reasonable, but I don't
know enough about copy to know if there are any negative
consequences. I can check in if someone else agrees. Tim?
Guido?

[tim-one]

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Assigned to Guido because he knows more about this and
I'm out of time for the next two days.

[gvanrossum]

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Looks fine to me; classic instances already did the same
thing. Thanks, Steven!

[gvanrossum]

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Reopened - Neal, would you mind backporting this to 2.2?

[nnorwitz]

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I'm working on this (slowly). It wasn't a simple backport.

[jlgijsbers]

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Closing this, as no 2.2 bugfix release if forthcoming anymore.