Py_tp_finalize is missing

[encukou]

BPO	24345
Nosy	@encukou
Files	add-py-tp-finalize.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 2015-06-01.15:14:43.667>
created_at = <Date 2015-06-01.13:41:14.555>
labels = ['extension-modules', 'interpreter-core']
title = 'Py_tp_finalize is missing'
updated_at = <Date 2015-06-01.15:14:43.665>
user = 'https://github.com/encukou'

bugs.python.org fields:

activity = <Date 2015-06-01.15:14:43.665>
actor = 'python-dev'
assignee = 'none'
closed = True
closed_date = <Date 2015-06-01.15:14:43.667>
closer = 'python-dev'
components = ['Extension Modules', 'Interpreter Core']
creation = <Date 2015-06-01.13:41:14.555>
creator = 'petr.viktorin'
dependencies = []
files = ['39585']
hgrepos = []
issue_num = 24345
keywords = ['patch']
message_count = 2.0
messages = ['244581', '244591']
nosy_count = 2.0
nosy_names = ['petr.viktorin', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue24345'
versions = ['Python 3.4', 'Python 3.5', 'Python 3.6']

[encukou]

PEP-442 added the tp_finalize member for objects, but there's no corresponding Py_tp_finalize slot. This means that types defined using PyType_FromSpec (and in particular, extensions using the stable ABI) can't take advantage of the new GC finalization mechanism.

[python-dev]

New changeset 5a354de919aa by Benjamin Peterson in branch '3.5':
add Py_tp_finalize slot (closes bpo-24345)
https://hg.python.org/cpython/rev/5a354de919aa

New changeset 959e998aa167 by Benjamin Peterson in branch 'default':
merge 3.5 (bpo-24345)
https://hg.python.org/cpython/rev/959e998aa167