python / python/cpython

os.makedirs fails on long-path UNC-paths if it is the first sub-folder

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OS-windows pending stdlib type-bug
Dominant language
Python
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Description

BPO 41705
Nosy @pfmoore, @tjguk, @zware, @eryksun, @zooba, @Safihre

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 2020-09-03.19:28:37.918>
labels = ['type-bug', '3.8', 'OS-windows']
title = 'os.makedirs fails on long-path UNC-paths if it is the first sub-folder'
updated_at = <Date 2020-09-03.22:01:32.759>
user = 'https://github.com/Safihre'

bugs.python.org fields:

activity = <Date 2020-09-03.22:01:32.759>
actor = 'eryksun'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Windows']
creation = <Date 2020-09-03.19:28:37.918>
creator = 'Safihre'
dependencies = []
files = []
hgrepos = []
issue_num = 41705
keywords = []
message_count = 2.0
messages = ['376312', '376326']
nosy_count = 6.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'eryksun', 'steve.dower', 'Safihre']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue41705'
versions = ['Python 3.8']

Contributor guide

Open the contributing guide

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 with the os.makedirs entry point and reproduce the failure on Windows using a long-path UNC path where the target is the first sub-folder. Compare the failing behavior with a path containing an existing parent; done means os.makedirs creates the requested directory successfully in the reported case and the regression is covered by a test.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

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