python / python/cpython

copy.deepcopy can fail with unhelpful diagnostics

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3.9 (EOL) stdlib type-feature
Dominant language
Python
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Description

BPO 46809
Nosy @remdragon

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 2022-02-20.15:57:04.499>
labels = ['type-feature', 'library', '3.9']
title = 'copy.deepcopy can fail with unhelpful diagnostics'
updated_at = <Date 2022-02-20.15:57:04.499>
user = 'https://github.com/remdragon'

bugs.python.org fields:

activity = <Date 2022-02-20.15:57:04.499>
actor = 'remdragon'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2022-02-20.15:57:04.499>
creator = 'remdragon'
dependencies = []
files = []
hgrepos = []
issue_num = 46809
keywords = []
message_count = 1.0
messages = ['413594']
nosy_count = 1.0
nosy_names = ['remdragon']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46809'
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 at the copy.deepcopy entry point in Python's standard library and inspect its failure paths. The issue provides no reproducer, target diagnostic, file, or test, so clarify the expected failure case and message with maintainers before adding coverage and verifying the improved diagnostics.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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