Summary

How to reproduce:

$ mkdir foo
$ echo '
import foo.bar.module
import foo.baz.module

__all__ = []
' > foo/__init__.py

$ cargo run --bin ruff -- check test_f401_dup/foo/__init__.py --select F401 --preview --fix foo/__init__.py

foo/__init__.py looks like this after the fix is applied:

import foo.bar.module
import foo.baz.module

__all__ = [
    "foo",
    ...,
    "foo",
    "foo",
    "foo",
    "foo",
]

It appears that foo.baz.module is never marked as used, and ruff keeps adding foo in __all__.

Version

da188d5

Context

Ran into this bug when I upgraded ruff to 0.14.10 in mlflow/mlflow