False positive `B023` with loop's local variable
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Description
def some_fn(*_) -> None:
...
for _ in range(1):
foo = 0
some_fn(lambda: foo)
Since foo is a local variable in the loop, B023 shouldn't happen here (unless I am mistaken about something).
Running flake8==6.0.0 with flake8-bugbear==23.7.10 on this:
> flake8 a.py
a.py:7:21: B023 Function definition does not bind loop variable 'foo'.
I think this relates to https://github.com/PyCQA/flake8-bugbear/issues/269 or https://github.com/PyCQA/flake8-bugbear/issues/380.
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Research direction
Reproduce the report using the shown a.py example and the specified flake8 command. Then locate the B023 implementation and its existing tests, and add coverage showing that a loop-local variable should not trigger B023; done means the example produces no B023 while genuine loop-variable cases remain detected.
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Assessment
- Tech stack
- python
- Domain
- tooling
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 48/100