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issubclass segfaults on objects with weird __getattr__ #74755

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@DanielLepage

Description

@DanielLepage
Issue body actions
BPO 30570
Nosy @gpshead, @db3l, @cfbolz, @bitdancer, @ambv, @serhiy-storchaka, @nicoddemus, @DimitrisJim, @mlouielu, @pablogsal, @miss-islington, @sweeneyde, @iritkatriel
PRs
  • bpo-30570: fix an issubclass infinite recursion crash #29017
  • bpo-30570: Use Py_EnterRecursiveCall() in issubclass() #29048
  • [3.10] bpo-30570: Use Py_EnterRecursiveCall() in issubclass() (GH-29048) #29175
  • [3.9] bpo-30570: Use Py_EnterRecursiveCall() in issubclass() (GH-29048) #29178
  • bpo-30570: Fix segfault on buildbots caused by stack overflow from recursion in tests #29258
  • [3.10] bpo-30570: Fix segfault on buildbots caused by stack overflow from recursion in tests (GH-29258) #29414
  • [3.9] bpo-30570: Fix segfault on buildbots caused by stack overflow from recursion in tests (GH-29258) #29415
  • Files
  • segfault.crash: Crash Log
  • 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/gpshead'
    closed_at = <Date 2021-11-04.20:53:21.931>
    created_at = <Date 2017-06-05.00:25:34.296>
    labels = ['interpreter-core', '3.10', '3.9', 'type-crash', '3.11']
    title = 'issubclass segfaults on objects with weird __getattr__'
    updated_at = <Date 2021-11-15.05:42:14.836>
    user = 'https://bugs.python.org/DanielLepage'

    bugs.python.org fields:

    activity = <Date 2021-11-15.05:42:14.836>
    actor = 'Dennis Sweeney'
    assignee = 'gregory.p.smith'
    closed = True
    closed_date = <Date 2021-11-04.20:53:21.931>
    closer = 'lukasz.langa'
    components = ['Interpreter Core']
    creation = <Date 2017-06-05.00:25:34.296>
    creator = 'Daniel Lepage'
    dependencies = []
    files = ['46924']
    hgrepos = []
    issue_num = 30570
    keywords = ['patch']
    message_count = 22.0
    messages = ['295150', '295151', '295152', '295153', '295179', '295181', '401381', '404151', '404152', '404157', '404158', '404829', '404831', '405144', '405173', '405750', '405753', '405754', '405755', '406328', '406330', '406340']
    nosy_count = 14.0
    nosy_names = ['gregory.p.smith', 'db3l', 'Carl.Friedrich.Bolz', 'r.david.murray', 'lukasz.langa', 'serhiy.storchaka', 'Bruno Oliveira', 'Daniel Lepage', 'Jim Fasarakis-Hilliard', 'louielu', 'pablogsal', 'miss-islington', 'Dennis Sweeney', 'iritkatriel']
    pr_nums = ['29017', '29048', '29175', '29178', '29258', '29414', '29415']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'crash'
    url = 'https://bugs.python.org/issue30570'
    versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']

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    3.10only security fixesonly security fixes3.11only security fixesonly security fixes3.9 (EOL)end of lifeend of lifeinterpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

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