python / python/cpython

The variable __module__ in the class body getting an undesirable value from __prepare__ of the metaclass

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3.9 (EOL) interpreter-core type-bug
Dominant language
Python
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Description

BPO 47136
Nosy @stevendaprano, @ethanfurman

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 2022-03-27.11:17:56.075>
labels = ['interpreter-core', 'type-bug', '3.9']
title = 'The variable __module__ in the class body getting an undesirable value from __prepare__ of the metaclass'
updated_at = <Date 2022-04-07.11:50:41.756>
user = 'https://bugs.python.org/TakuoMatsuoka'

bugs.python.org fields:

activity = <Date 2022-04-07.11:50:41.756>
actor = 'steven.daprano'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2022-03-27.11:17:56.075>
creator = 'Takuo Matsuoka'
dependencies = []
files = []
hgrepos = []
issue_num = 47136
keywords = []
message_count = 10.0
messages = ['416118', '416136', '416143', '416743', '416745', '416746', '416769', '416789', '416914', '416924']
nosy_count = 3.0
nosy_names = ['steven.daprano', 'ethan.furman', 'Takuo Matsuoka']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue47136'
versions = ['Python 3.9']

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 with BPO-47136 and the CPython interpreter-core context; the payload names no implementation file or test. Determine the intended value of module when a metaclass supplies prepare, then identify the relevant interpreter entry point and regression-test location. Done means the behavior is specified and corrected for Python 3.9 with coverage for the reported case.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
compilers
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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