C419 unsafe fixes with trailing comma causes syntax error: "Generator expression must be parenthesized"

[ROCKTAKEY]

Hello, thanks for such a great package!

When fixing C419 with --unsafe-fixes on .py file with trailing comma, the fixed code sometimes causes syntax error, because the trailing comma is not removed.

A minimal code snippet that reproduces the bug.

1. Save the following contents to example.py:

any([i for i in [1, 2]],)

2. Execute the following contents:

ruff check example.py --select C419 --isolated --unsafe-fixes --fix

3. Now, example.py has the following contents:

any(i for i in [1, 2],)

4. Then, python example.py causes syntax error:

  File "/path/to/example.py", line 1
    any(i for i in [1, 2],)
        ^^^^^^^^^^^^^^^^^
SyntaxError: Generator expression must be parenthesized

Additional information

List of keywords you searched for before creating this issue.

• C419

The current Ruff settings

• No pyproject.toml

The current Ruff version

ruff 0.7.2