Description

pablogsal

opened on Dec 9, 2021

Issue body actions

BPO	46025
Nosy	@vstinner, @pablogsal, @miss-islington
PRs	bpo-46025: Fix a crash in the atexit module for auto-unregistering functions #30002 [3.10] bpo-46025: Fix a crash in the atexit module for auto-unregistering functions (GH-30002) #30005

^{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 2021-12-09.15:15:34.300>
created_at = <Date 2021-12-09.11:20:52.793>
labels = ['3.10', '3.11']
title = 'Raising in an atexit function in dev mode crashes'
updated_at = <Date 2021-12-09.17:06:29.881>
user = 'https://github.com/pablogsal'

bugs.python.org fields:

activity = <Date 2021-12-09.17:06:29.881>
actor = 'pablogsal'
assignee = 'none'
closed = True
closed_date = <Date 2021-12-09.15:15:34.300>
closer = 'pablogsal'
components = []
creation = <Date 2021-12-09.11:20:52.793>
creator = 'pablogsal'
dependencies = []
files = []
hgrepos = []
issue_num = 46025
keywords = ['patch', '3.10regression', '3.11regression']
message_count = 6.0
messages = ['408106', '408123', '408132', '408143', '408144', '408147']
nosy_count = 3.0
nosy_names = ['vstinner', 'pablogsal', 'miss-islington']
pr_nums = ['30002', '30005']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue46025'
versions = ['Python 3.10', 'Python 3.11']

Activity

1. pablogsal commented on Dec 9, 2021

   

   pablogsal

   on Dec 9, 2021

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   Issue found by Matt Wozniski:

   Running this with python3.10 -X dev segfaults:

   import atexit
   def func():
       atexit.unregister(func)
       1/0
   atexit.register(func)
2. pablogsal

   added

   3.10 (EOL)end of lifeend of life

   3.11only security fixesonly security fixes

   on Dec 9, 2021
3. pablogsal commented on Dec 9, 2021

   

   pablogsal

   on Dec 9, 2021

   MemberAuthor

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   New changeset f0d290d by Pablo Galindo Salgado in branch 'main':
   bpo-46025: Fix a crash in the atexit module for auto-unregistering functions (GH-30002)
   f0d290d
4. pablogsal

   closed this as completedon Dec 9, 2021
5. pablogsal

   closed this as completedon Dec 9, 2021
6. pablogsal commented on Dec 9, 2021

   

   pablogsal

   on Dec 9, 2021

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   New changeset 934a24c by Miss Islington (bot) in branch '3.10':
   bpo-46025: Fix a crash in the atexit module for auto-unregistering functions (GH-30002) (GH-30005)
   934a24c
7. vstinner commented on Dec 9, 2021

   

   vstinner

   on Dec 9, 2021

   Member

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   Interesting bug report! Thanks for the fix ;-)
8. vstinner commented on Dec 9, 2021

   

   vstinner

   on Dec 9, 2021

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   For me, the question is why would anyone call atexit.unregister() inside an atexit callback. Is it useful?

   atexit._run_exitfuncs() removes all registered callbacks.

   Py_Finalize() calls _PyAtExit_Call() which also removes all registered callbacks.
9. pablogsal commented on Dec 9, 2021

   

   pablogsal

   on Dec 9, 2021

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   For me, the question is why would anyone call atexit.unregister() inside an atexit callback. Is it useful?

   Is not useful, is just an edge case
10. ezio-melotti

    transferred this issue fromon Apr 10, 2022

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