python / python/cpython

100000 assignments of .__sizeof__ cause a segfault on del

Open
#87,053 10 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

3.10 interpreter-core type-crash
Dominant language
Python
Stars
77.2k
Forks
36k
PR merge metrics
PR metrics pending

Description

BPO 42887
Nosy @terryjreedy, @ronaldoussoren, @vstinner, @tiran, @markshannon, @serhiy-storchaka, @WildCard65

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-01-11.07:38:04.066>
labels = ['interpreter-core', '3.10', 'type-crash']
title = '100000 assignments of .__sizeof__  cause a segfault on del'
updated_at = <Date 2021-01-19.17:07:10.964>
user = 'https://bugs.python.org/xxm'

bugs.python.org fields:

activity = <Date 2021-01-19.17:07:10.964>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-01-11.07:38:04.066>
creator = 'xxm'
dependencies = []
files = []
hgrepos = []
issue_num = 42887
keywords = []
message_count = 10.0
messages = ['384797', '384801', '384802', '385128', '385132', '385134', '385177', '385187', '385265', '385267']
nosy_count = 8.0
nosy_names = ['terry.reedy', 'ronaldoussoren', 'vstinner', 'christian.heimes', 'Mark.Shannon', 'serhiy.storchaka', 'WildCard65', 'xxm']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue42887'
versions = ['Python 3.10']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the linked BPO issue 42887 and its discussion; the migrated record names Interpreter Core and Python 3.10 but no files, reproduction test, or patch location. Confirm the 100000 assignments of .sizeof scenario and trace the deletion crash before deciding where a regression test belongs. Done means the reproducer no longer segfaults on deletion and the regression is covered by a test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
compilers
Issue type
Bug
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
20/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.