python / python/cpython

f_lasti behaves differently for lambdas returned from loops

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3.11 interpreter-core
Dominant language
Python
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Description

BPO 46225
Nosy @nedbat, @markshannon

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 2022-01-02.13:45:09.060>
labels = ['3.11']
title = 'f_lasti behaves differently for lambdas returned from loops'
updated_at = <Date 2022-01-09.14:40:45.913>
user = 'https://github.com/nedbat'

bugs.python.org fields:

activity = <Date 2022-01-09.14:40:45.913>
actor = 'nedbat'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2022-01-02.13:45:09.060>
creator = 'nedbat'
dependencies = []
files = []
hgrepos = []
issue_num = 46225
keywords = ['3.11regression']
message_count = 4.0
messages = ['409496', '409497', '409845', '410152']
nosy_count = 2.0
nosy_names = ['nedbat', 'Mark.Shannon']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue46225'
versions = ['Python 3.11']

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

No source file, test, or entry point is named. Start by reproducing the differing f_lasti behavior for lambdas returned from loops and review the linked BPO issue 46225; done means the behavior is understood and the issue has a clearly verified resolution.

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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