[New-bugs-announce] [issue1878] class attribute cache failure (regression)

[Paul Pogonyshev]

New submission from Paul Pogonyshev:

I have a regression from Python 2.5 to Python SVN (would-be-2.6).  I
believe this because of class attribute caching.  The problem shown
below happens because AbstractGCProtector is an extension class.  So,
Python interpreter doesn't have a chance to notice set_default() method
below changes a class attribute.

>>> from notify.all import *
>>> original_protector = AbstractGCProtector.default
>>> new_protector = FastGCProtector ()
>>> AbstractGCProtector.default is new_protector
False
>>> AbstractGCProtector.default is original_protector
True

Please note that this a regression.  This code works as expected in 2.3
and 2.5.

----------
components: Interpreter Core
messages: 61316
nosy: _doublep
severity: major
status: open
title: class attribute cache failure (regression)
type: behavior
versions: Python 2.6

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Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1878>
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