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Strange reversed dict behavior #82706

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Description

@ivb
mannequin
BPO 38525
Nosy @ned-deily, @methane, @serhiy-storchaka, @corona10, @pablogsal, @miss-islington, @Harmon758, @remilapeyre, @tirkarthi
PRs
  • bpo-38525: Fix a segmentation fault when using reverse iterators of empty dict #16846
  • bpo-38525: Fix segfault when using reverse iterators of empty dict literals #16847
  • [3.8] bpo-38525: Fix a segmentation fault when using reverse iterators of empty dict (GH-16846) #16853
  • 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 = <Date 2019-10-19.20:23:30.477>
    created_at = <Date 2019-10-19.08:00:52.660>
    labels = ['interpreter-core', '3.8', '3.9', 'type-crash']
    title = 'Strange reversed dict behavior'
    updated_at = <Date 2019-11-14.10:48:55.574>
    user = 'https://bugs.python.org/ivb'

    bugs.python.org fields:

    activity = <Date 2019-11-14.10:48:55.574>
    actor = 'Harmon758'
    assignee = 'none'
    closed = True
    closed_date = <Date 2019-10-19.20:23:30.477>
    closer = 'pablogsal'
    components = ['Interpreter Core']
    creation = <Date 2019-10-19.08:00:52.660>
    creator = 'ivb'
    dependencies = []
    files = []
    hgrepos = []
    issue_num = 38525
    keywords = ['patch']
    message_count = 15.0
    messages = ['354931', '354932', '354933', '354938', '354939', '354940', '354944', '354945', '354946', '354947', '354948', '354949', '354961', '354962', '354963']
    nosy_count = 10.0
    nosy_names = ['ned.deily', 'methane', 'ivb', 'serhiy.storchaka', 'corona10', 'pablogsal', 'miss-islington', 'Harmon758', 'remi.lapeyre', 'xtreak']
    pr_nums = ['16846', '16847', '16853']
    priority = 'critical'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'crash'
    url = 'https://bugs.python.org/issue38525'
    versions = ['Python 3.8', 'Python 3.9']

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      3.8 (EOL)end of life3.9 (EOL)end of lifeinterpreter-core(Objects, Python, Grammar, and Parser dirs)type-crashA hard crash of the interpreter, possibly with a core dump

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