BufferedRWpair doesn't clear weakrefs

[pkt]

BPO	22517
Nosy	@pitrou, @benjaminp
Files	poc_brwpair_weakref.py

^{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 2014-09-30.02:49:43.337>
created_at = <Date 2014-09-29.20:59:02.155>
labels = ['type-crash']
title = "BufferedRWpair doesn't clear weakrefs"
updated_at = <Date 2014-10-15.12:07:23.733>
user = 'https://bugs.python.org/pkt'

bugs.python.org fields:

activity = <Date 2014-10-15.12:07:23.733>
actor = 'pkt'
assignee = 'none'
closed = True
closed_date = <Date 2014-09-30.02:49:43.337>
closer = 'python-dev'
components = []
creation = <Date 2014-09-29.20:59:02.155>
creator = 'pkt'
dependencies = []
files = ['36753']
hgrepos = []
issue_num = 22517
keywords = []
message_count = 5.0
messages = ['227835', '227866', '227905', '227922', '229438']
nosy_count = 6.0
nosy_names = ['pitrou', 'benjamin.peterson', 'stutzbach', 'Arfrever', 'python-dev', 'pkt']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue22517'
versions = ['Python 2.7', 'Python 3.3', 'Python 3.4', 'Python 3.5']

[pkt]

# static void
# bufferedrwpair_dealloc(rwpair *self)
# {
# _PyObject_GC_UNTRACK(self);
# Py_CLEAR(self->reader);
# Py_CLEAR(self->writer);
# Py_CLEAR(self->dict);
# Py_TYPE(self)->tp_free((PyObject *) self);
# }
#
# Weakrefs to this object contain stale pointer after BufferedRWPair is freed.

[python-dev]

New changeset 9b4673d7b046 by Benjamin Peterson in branch '2.7':
clear BufferedRWPair weakrefs on deallocation (closes bpo-22517)
https://hg.python.org/cpython/rev/9b4673d7b046

New changeset e834b32f0422 by Benjamin Peterson in branch '3.3':
clear BufferedRWPair weakrefs on deallocation (closes bpo-22517)
https://hg.python.org/cpython/rev/e834b32f0422

New changeset e54da75100f6 by Benjamin Peterson in branch '3.4':
merge 3.3 (bpo-22517)
https://hg.python.org/cpython/rev/e54da75100f6

New changeset a2add97e28b9 by Benjamin Peterson in branch 'default':
merge 3.4 (bpo-22517)
https://hg.python.org/cpython/rev/a2add97e28b9

[python-dev]

New changeset 4fa5239624b8 by Georg Brandl in branch '3.2':
Issue bpo-22517: When a io.BufferedRWPair object is deallocated, clear its
https://hg.python.org/cpython/rev/4fa5239624b8

[pitrou]

It's an actual crash, AFAIK.

[pkt]

Why did the type changed from security to crash?