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double free in io.TextIOWrapper #72573

@scufre

Description

@scufre
mannequin
BPO 28387
Nosy @benjaminp, @serhiy-storchaka
PRs
  • [Do Not Merge] Convert Misc/NEWS so that it is managed by towncrier #552
  • Files
  • textiowrapper_crash.py: Proof of concept to demostrate the issue
  • textio.c.patch: Proposed fix
  • textiowrapper_clear-3.5.patch
  • textiowrapper_clear-2.7.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 = 'https://github.com/serhiy-storchaka'
    closed_at = <Date 2016-11-03.13:41:50.317>
    created_at = <Date 2016-10-07.19:32:57.587>
    labels = ['extension-modules', '3.7', 'expert-IO', 'type-crash']
    title = 'double free in io.TextIOWrapper'
    updated_at = <Date 2017-03-31.16:36:23.657>
    user = 'https://bugs.python.org/scufre'

    bugs.python.org fields:

    activity = <Date 2017-03-31.16:36:23.657>
    actor = 'dstufft'
    assignee = 'serhiy.storchaka'
    closed = True
    closed_date = <Date 2016-11-03.13:41:50.317>
    closer = 'serhiy.storchaka'
    components = ['Extension Modules', 'IO']
    creation = <Date 2016-10-07.19:32:57.587>
    creator = 'scufre'
    dependencies = []
    files = ['45004', '45005', '45274', '45275']
    hgrepos = []
    issue_num = 28387
    keywords = ['patch']
    message_count = 3.0
    messages = ['278263', '279717', '279994']
    nosy_count = 5.0
    nosy_names = ['benjamin.peterson', 'stutzbach', 'python-dev', 'serhiy.storchaka', 'scufre']
    pr_nums = ['552']
    priority = 'high'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'crash'
    url = 'https://bugs.python.org/issue28387'
    versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7']

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    Labels

    3.7 (EOL)end of lifeextension-modulesC modules in the Modules dirtopic-IOtype-crashA hard crash of the interpreter, possibly with a core dump

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