python / python/cpython

from __future__ import annotations breaks profiler's handling of dataclasses

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3.11 3.12 3.13 stdlib type-bug
Dominant language
Python
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Forks
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PR merge metrics
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Description

BPO 44414
Nosy @JelleZijlstra, @wilcoxjay

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 2021-06-13.21:20:30.284>
labels = ['type-bug', 'library', '3.9']
title = "from __future__ import annotations breaks profiler's handling of dataclasses"
updated_at = <Date 2021-06-14.04:51:07.905>
user = 'https://github.com/wilcoxjay'

bugs.python.org fields:

activity = <Date 2021-06-14.04:51:07.905>
actor = 'JelleZijlstra'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-06-13.21:20:30.284>
creator = 'wilcoxjay'
dependencies = []
files = []
hgrepos = []
issue_num = 44414
keywords = []
message_count = 1.0
messages = ['395762']
nosy_count = 2.0
nosy_names = ['JelleZijlstra', 'wilcoxjay']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44414'
versions = ['Python 3.9']

Linked PRs
  • gh-155600

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 reviewing the profiler and dataclasses behavior described in the issue, then inspect linked PR gh-155600 for the current direction. Confirm the failure with a focused reproduction using from future import annotations and dataclasses; done means profiler handling works correctly without regressing existing behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
tooling
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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