python / python/cpython

Control flow inconsistency on closed asyncio stream

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OS-windows topic-asyncio type-bug
Dominant language
Python
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Description

BPO 35840
Nosy @pfmoore, @tjguk, @asvetlov, @schlamar, @zware, @1st1, @zooba, @eamanu
Files
  • tcp_test.py
  • tcp_test.py
  • 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 2019-01-28.07:54:05.359>
    labels = ['type-bug', '3.7', 'OS-windows', 'expert-asyncio']
    title = 'Control flow inconsistency on closed asyncio stream'
    updated_at = <Date 2019-02-25.18:57:20.343>
    user = 'https://github.com/schlamar'
    

    bugs.python.org fields:

    activity = <Date 2019-02-25.18:57:20.343>
    actor = 'eamanu'
    assignee = 'none'
    closed = False
    closed_date = None
    closer = None
    components = ['Windows', 'asyncio']
    creation = <Date 2019-01-28.07:54:05.359>
    creator = 'schlamar'
    dependencies = []
    files = ['48082', '48160']
    hgrepos = []
    issue_num = 35840
    keywords = []
    message_count = 5.0
    messages = ['334450', '334453', '336144', '336252', '336548']
    nosy_count = 8.0
    nosy_names = ['paul.moore', 'tim.golden', 'asvetlov', 'schlamar', 'zach.ware', 'yselivanov', 'steve.dower', 'eamanu']
    pr_nums = []
    priority = 'normal'
    resolution = None
    stage = None
    status = 'open'
    superseder = None
    type = 'behavior'
    url = 'https://bugs.python.org/issue35840'
    versions = ['Python 3.7']
    

    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 comparing the two uploaded tcp_test.py reproductions (files 48082 and 48160) and examining the asyncio stream behavior when the stream is closed on Windows. Reproduce the inconsistent control flow and determine the expected behavior; done means the closed-stream path is consistent and covered by a regression test.

    Written by the indexing model from the issue text.

    Assessment

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

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