This code snippet

def func(foo):
    for _ in bar(foo for foo in [1]):
        pass

triggers PLR1704 with ruff 0.5.2

$ ruff --version
ruff 0.5.2

$ ruff check --select PLR1704 test.py
test.py:2:26: PLR1704 Redefining argument with the local name `foo`
  |
1 | def func(foo):
2 |     for _ in bar(foo for foo in [1]):
  |                          ^^^ PLR1704
3 |         pass
  |

Found 1 error.

which is wrong. From the python3 docs:

However, aside from the iterable expression in the leftmost for clause, the comprehension is executed in a separate implicitly nested scope. This ensures that names assigned to in the target list don’t “leak” into the enclosing scope.