python / python/cpython

ctypes: fail to create a _ctypes._SimpleCData subclass using a closure like calling super() without arguments

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3.11 3.12 3.13 topic-ctypes type-bug
Dominant language
Python
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Description

BPO 29270
Nosy @ncoghlan, @vstinner, @serhiy-storchaka, @eryksun, @https://github.com/hakril, @waveform80
Files
  • issue_29270_01.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 = None
    created_at = <Date 2017-01-13.22:10:22.119>
    labels = ['ctypes', 'type-bug', '3.9', '3.10', '3.11']
    title = 'ctypes: fail to create a _ctypes._SimpleCData subclass using a closure like calling super() without arguments'
    updated_at = <Date 2022-03-28.22:12:40.498>
    user = 'https://github.com/waveform80'
    

    bugs.python.org fields:

    activity = <Date 2022-03-28.22:12:40.498>
    actor = 'vstinner'
    assignee = 'none'
    closed = False
    closed_date = None
    closer = None
    components = ['ctypes']
    creation = <Date 2017-01-13.22:10:22.119>
    creator = 'Dave Jones'
    dependencies = []
    files = ['46285']
    hgrepos = []
    issue_num = 29270
    keywords = ['patch']
    message_count = 14.0
    messages = ['285444', '285450', '285454', '285469', '285473', '285474', '285475', '285480', '286287', '286310', '313985', '355368', '360252', '416219']
    nosy_count = 7.0
    nosy_names = ['ncoghlan', 'vstinner', 'serhiy.storchaka', 'eryksun', 'hakril', 'Dave Jones', 'Asdger Gdsfe']
    pr_nums = []
    priority = 'normal'
    resolution = None
    stage = 'needs patch'
    status = 'open'
    superseder = None
    type = 'behavior'
    url = 'https://bugs.python.org/issue29270'
    versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']
    

    Linked PRs
    • gh-104576

    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 by reviewing the linked issue_29270_01.patch and PR gh-104576, then inspect the ctypes implementation and existing tests around _ctypes._SimpleCData subclass creation. Done means the reported closure and argument-less super() case behaves correctly and the relevant tests pass.

    Written by the indexing model from the issue text.

    Assessment

    Tech stack
    python
    Domain
    backend
    Issue type
    Bug
    Difficulty
    4/5
    Estimated time
    3-5 days
    Activity status
    Stale
    Clarity
    Mostly clear
    Newbie friendliness
    25/100

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