python / python/cpython

glob.glob with ** does not always detect symlink loops

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stdlib type-bug
Dominant language
Python
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Avg merge
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Merged PRs (30d)
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Description

BPO 43875

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 2021-04-16.20:08:18.994>
labels = ['library', '3.9']
title = 'glob.glob with ** does not always detect symlink loops'
updated_at = <Date 2021-04-16.20:10:06.645>
user = 'https://bugs.python.org/rrt'

bugs.python.org fields:

activity = <Date 2021-04-16.20:10:06.645>
actor = 'rrt'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-04-16.20:08:18.994>
creator = 'rrt'
dependencies = []
files = []
hgrepos = []
issue_num = 43875
keywords = []
message_count = 1.0
messages = ['391253']
nosy_count = 1.0
nosy_names = ['rrt']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue43875'
versions = ['Python 3.9']

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 by reproducing the reported symlink-loop case through Python's glob.glob with recursive ** patterns. Then inspect the glob library implementation and its existing tests; done means recursive globbing consistently detects and handles symlink loops without the reported miss.

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
25/100

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