ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth
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3.10
3.11
3.9 (EOL)
stdlib
type-bug
- Dominant language
- Python
- Stars
- 77.2k
- Forks
- 36k
- PR merge metrics
- PR metrics pending
Description
| BPO | 29221 |
|---|---|
| Nosy | @rhettinger, @AstraLuma, @serhiy-storchaka, @scopatz, @iritkatriel |
| Files |
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 2017-01-10.04:18:47.408>
labels = ['type-bug', 'library', '3.9', '3.10', '3.11']
title = 'ABC Recursion Error on isinstance() with less than recursion limit class hierarchy depth'
updated_at = <Date 2021-12-11.23:00:45.493>
user = 'https://github.com/scopatz'
bugs.python.org fields:
activity = <Date 2021-12-11.23:00:45.493>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2017-01-10.04:18:47.408>
creator = 'scopatz'
dependencies = []
files = ['46236', '46251', '46252']
hgrepos = []
issue_num = 29221
keywords = []
message_count = 6.0
messages = ['285090', '285185', '285189', '285342', '407760', '408347']
nosy_count = 5.0
nosy_names = ['rhettinger', 'AstraLuma', 'serhiy.storchaka', 'scopatz', 'iritkatriel']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue29221'
versions = ['Python 3.9', 'Python 3.10', 'Python 3.11']
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 by running abc_rec_fail.py and cache_example.py, which reproduce failures in isinstance() at the reported hierarchy depths; review the linked issue context and cache-scaling fibo.png. The work is not yet scoped to a specific change, so completion would require an agreed expected behavior and a regression check showing the reported recursion error no longer occurs.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- python
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100