python / python/cpython

Pickling and copying exceptions doesn't preserve non-__dict__ attributes

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3.11 interpreter-core type-bug
Dominant language
Python
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Description

BPO 30005
Nosy @avassalotti, @serhiy-storchaka, @iritkatriel
Dependencies
  • bpo-29998: Pickling and copying ImportError doesn't preserve name and path
  • 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 2017-04-06.05:59:35.082>
    labels = ['interpreter-core', 'type-bug', '3.11']
    title = "Pickling and copying exceptions doesn't preserve non-__dict__ attributes"
    updated_at = <Date 2021-06-27.21:37:57.332>
    user = 'https://github.com/serhiy-storchaka'
    

    bugs.python.org fields:

    activity = <Date 2021-06-27.21:37:57.332>
    actor = 'iritkatriel'
    assignee = 'none'
    closed = False
    closed_date = None
    closer = None
    components = ['Interpreter Core']
    creation = <Date 2017-04-06.05:59:35.082>
    creator = 'serhiy.storchaka'
    dependencies = ['29998']
    files = []
    hgrepos = []
    issue_num = 30005
    keywords = []
    message_count = 2.0
    messages = ['291212', '396602']
    nosy_count = 3.0
    nosy_names = ['alexandre.vassalotti', 'serhiy.storchaka', 'iritkatriel']
    pr_nums = []
    priority = 'normal'
    resolution = None
    stage = 'needs patch'
    status = 'open'
    superseder = None
    type = 'behavior'
    url = 'https://bugs.python.org/issue30005'
    versions = ['Python 3.11']
    

    Contributor guide

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    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

    No source files or tests are named. Start by tracing CPython's exception pickling and copying behavior, and review the dependent bpo-29998 issue for related context. Done means non-dict exception attributes survive both pickling and copying, with regression coverage for the behavior.

    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
    Needs clarification
    Newbie friendliness
    30/100

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