python / python/cpython

Incorrect Argument Order for Calls to _winapi.DuplicateHandle() in multiprocessing.reduction.DupHandle

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3.10 3.8 (EOL) 3.9 (EOL) OS-windows stdlib topic-multiprocessing type-bug
Dominant language
Python
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Description

BPO 38188
Nosy @pfmoore, @tjguk, @zware, @eryksun, @zooba

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 2019-09-16.17:51:37.160>
labels = ['type-bug', '3.8', '3.9', '3.10', 'library', 'OS-windows']
title = 'Incorrect Argument Order for Calls to _winapi.DuplicateHandle() in multiprocessing.reduction.DupHandle'
updated_at = <Date 2021-03-22.00:46:22.682>
user = 'https://bugs.python.org/m3rc1fulcameron'

bugs.python.org fields:

activity = <Date 2021-03-22.00:46:22.682>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)', 'Windows']
creation = <Date 2019-09-16.17:51:37.160>
creator = 'm3rc1fulcameron'
dependencies = []
files = []
hgrepos = []
issue_num = 38188
keywords = []
message_count = 3.0
messages = ['352560', '352610', '352615']
nosy_count = 6.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'eryksun', 'steve.dower', 'm3rc1fulcameron']
pr_nums = []
priority = 'normal'
resolution = None
stage = 'needs patch'
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38188'
versions = ['Python 3.8', 'Python 3.9', 'Python 3.10']

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at multiprocessing.reduction.DupHandle and inspect its calls to _winapi.DuplicateHandle, then compare the supplied argument order with the Windows API. No source file or test is named in the issue; done means correcting the call order and validating the Windows multiprocessing behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
operating-systems
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
38/100

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