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weak references are removed before __del__ is called. #46213
Description
| BPO | 1918 |
|---|---|
| Nosy | @gvanrossum, @birkenfeld, @tiran |
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 = 'https://github.com/birkenfeld'
closed_at = <Date 2008-03-22.10:07:41.710>
created_at = <Date 2008-01-23.18:34:14.454>
labels = ['interpreter-core', 'type-bug']
title = 'weak references are removed before __del__ is called.'
updated_at = <Date 2008-03-22.10:07:41.698>
user = 'https://bugs.python.org/jforan'bugs.python.org fields:
activity = <Date 2008-03-22.10:07:41.698>
actor = 'georg.brandl'
assignee = 'georg.brandl'
closed = True
closed_date = <Date 2008-03-22.10:07:41.710>
closer = 'georg.brandl'
components = ['Interpreter Core']
creation = <Date 2008-01-23.18:34:14.454>
creator = 'jforan'
dependencies = []
files = []
hgrepos = []
issue_num = 1918
keywords = []
message_count = 4.0
messages = ['61597', '61600', '61604', '64317']
nosy_count = 4.0
nosy_names = ['gvanrossum', 'georg.brandl', 'christian.heimes', 'jforan']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue1918'
versions = ['Python 2.6', 'Python 2.5', 'Python 3.0']
Activity
jforan commentedon Jan 23, 2008
Not sure where to put example code, but here it goes:
tiran commentedon Jan 23, 2008
The behavior is documented in the C code. I don't know how it is
described in the docs.
Objects/typeobject.c around line 820 says:
/* If we added a weaklist, we clear it. Do this *before* calling
the finalizer (del), clearing slots, or clearing the instance
dict. */
gvanrossum commentedon Jan 23, 2008
Georg, can you update the docs? Weak references *to* an object are
cleared before the object's __del__ is called, to ensure that the weak
reference callback (if any) finds the object healthy.
birkenfeld commentedon Mar 22, 2008
Done in r61733.