3.14.0a1 urljoin regression wrt //
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Nobody has claimed this yet.
3.14
stdlib
type-bug
- Dominant language
- Python
- Stars
- 77.2k
- Forks
- 35.9k
- PR merge metrics
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Description
Bug report
Bug description:
The tests of lxml do (simplified):
from urllib.parse import urljoin
urljoin('file:', '/foo/bar')
- On Python 3.13.0 and earlier, the result of the urljoin call is
file:///foo/bar. - On Python 3.14.0a1, the result of the urljoin call is
file:/foo/bar.
This change of behavior was introduced in fc897fcc01964649f023e0baa4c95d142e4e8a10 https://github.com/python/cpython/pull/123273 cc @serhiy-storchaka
The NEWS entry in that change does not seem to indicate this change was intentional.
CPython versions tested on:
3.14, CPython main branch
Operating systems tested on:
Linux
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with urllib.parse.urljoin and inspect the behavior change introduced by fc897fcc01964649f023e0baa4c95d142e4e8a10. Reproduce the lxml-style example on Python 3.14 and confirm that the completed fix restores file:///foo/bar for urljoin('file:', '/foo/bar') without regressing the reported change.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- networking
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 45/100