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LZMA library sometimes fails to decompress a file #66071

Description

@vnummela
mannequin
BPO 21872
Nosy @gpshead, @4kir4, @peterjc, @serhiy-storchaka, @MojoVampire, @animalize, @miss-islington, @websurfer5
PRs
  • bpo-21872: fix lzma library decompresses data incompletely #14048
  • [3.8] bpo-21872: fix lzma library decompresses data incompletely (GH-14048) #16054
  • [3.7] bpo-21872: fix lzma library decompresses data incompletely (GH-14048) #16055
  • Files
  • Archive.zip: Example lzma-compressed files, a good one and a bad one
  • more_bad_lzma_files.zip: 15 more example files that fail lzma decompression
  • decompress-example-files.py
  • 02h_ticks.bi5: http://www.dukascopy.com/datafeed/EURUSD/2014/00/22/02h_ticks.bi5
  • failed_files_more.zip: 2 more failing files
  • fix-bug.diff
  • test_bad_files.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 = <Date 2019-09-12.15:25:19.616>
    created_at = <Date 2014-06-25.18:28:55.827>
    labels = ['3.7', '3.8', 'type-bug', 'library', '3.9']
    title = 'LZMA library sometimes fails to decompress a file'
    updated_at = <Date 2019-09-14.04:31:45.330>
    user = 'https://bugs.python.org/vnummela'

    bugs.python.org fields:

    activity = <Date 2019-09-14.04:31:45.330>
    actor = 'malin'
    assignee = 'none'
    closed = True
    closed_date = <Date 2019-09-12.15:25:19.616>
    closer = 'gregory.p.smith'
    components = ['Library (Lib)']
    creation = <Date 2014-06-25.18:28:55.827>
    creator = 'vnummela'
    dependencies = []
    files = ['35779', '35822', '37241', '40612', '47349', '48391', '48425']
    hgrepos = []
    issue_num = 21872
    keywords = ['patch']
    message_count = 20.0
    messages = ['221566', '221583', '221597', '221599', '221784', '222052', '231466', '231467', '251784', '309005', '344530', '344668', '345491', '345971', '345972', '352176', '352183', '352185', '352200', '352405']
    nosy_count = 13.0
    nosy_names = ['gregory.p.smith', 'nadeem.vawda', 'akira', 'maubp', 'serhiy.storchaka', 'Esa.Peuha', 'josh.r', 'malin', 'vnummela', 'kenorb', 'peremen', 'miss-islington', 'Jeffrey.Kintscher']
    pr_nums = ['14048', '16054', '16055']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'commit review'
    status = 'closed'
    superseder = None
    type = 'behavior'
    url = 'https://bugs.python.org/issue21872'
    versions = ['Python 3.7', 'Python 3.8', 'Python 3.9']

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      3.7 (EOL)end of life3.8 (EOL)end of life3.9 (EOL)end of lifestdlibStandard Library Python modules in the Lib/ directorytype-bugAn unexpected behavior, bug, or error

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