Misbehavior of BufferedRandom.write with raw file in append mode

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
20/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
python
Domain
operating-systems

Research direction

Start with the issue's BufferedRandom.write and raw-file append-mode report, then inspect buffered-append-1.patch and PR #21729. Done means the append-mode behavior is corrected and verified with the relevant CPython I/O tests.

Written by the indexing model from the issue text.

Description

topic-IO type-bug
BPO 20082
Nosy @pitrou, @benjaminp, @embray, @hynek, @serhiy-storchaka, @nitishch
PRs
  • python/cpython#21729
    		•
    Files
  • buffered-append-1.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 = None
closed_at = None
created_at = <Date 2013-12-27.23:33:12.824>
labels = ['type-bug', 'expert-IO']
title = 'Misbehavior of BufferedRandom.write with raw file in append mode'
updated_at = <Date 2020-08-04.11:02:17.371>
user = 'https://github.com/embray'

    bugs.python.org fields:

    activity = <Date 2020-08-04.11:02:17.371>
actor = 'erik.bray'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['IO']
creation = <Date 2013-12-27.23:33:12.824>
creator = 'erik.bray'
dependencies = []
files = ['33282']
hgrepos = []
issue_num = 20082
keywords = ['patch']
message_count = 2.0
messages = ['207015', '314448']
nosy_count = 7.0
nosy_names = ['pitrou', 'benjamin.peterson', 'stutzbach', 'erik.bray', 'hynek', 'serhiy.storchaka', 'nitishch']
pr_nums = ['21729']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue20082'
versions = ['Python 2.7', 'Python 3.4', 'Python 3.5']

    Dominant language
    Python
    Stars
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    Avg merge
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    Merged PRs (30d)
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