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Crash in Tokenizer - Heap-use-after-free #70188

Description

@WilliamBowling
BPO 26000
Nosy @serhiy-storchaka, @swgillespie, @tirkarthi
Superseder
  • bpo-31852: Crashes with lines of the form "async "
  • Files
  • asan2.txt
  • tokenizer_double_free.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 2018-09-24.15:32:03.520>
    created_at = <Date 2016-01-03.13:50:57.212>
    labels = ['interpreter-core', 'type-crash']
    title = 'Crash in Tokenizer - Heap-use-after-free'
    updated_at = <Date 2018-09-24.15:32:03.519>
    user = 'https://bugs.python.org/WilliamBowling'

    bugs.python.org fields:

    activity = <Date 2018-09-24.15:32:03.519>
    actor = 'xtreak'
    assignee = 'serhiy.storchaka'
    closed = True
    closed_date = <Date 2018-09-24.15:32:03.520>
    closer = 'xtreak'
    components = ['Interpreter Core']
    creation = <Date 2016-01-03.13:50:57.212>
    creator = 'William Bowling'
    dependencies = []
    files = ['41487', '41995']
    hgrepos = []
    issue_num = 26000
    keywords = ['patch']
    message_count = 8.0
    messages = ['257417', '257439', '260583', '260644', '326160', '326199', '326204', '326250']
    nosy_count = 4.0
    nosy_names = ['serhiy.storchaka', 'William Bowling', 'swgillespie', 'xtreak']
    pr_nums = []
    priority = 'high'
    resolution = 'duplicate'
    stage = 'resolved'
    status = 'closed'
    superseder = '31852'
    type = 'crash'
    url = 'https://bugs.python.org/issue26000'
    versions = ['Python 3.5']

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    interpreter-core(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dump

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