[Infinite Loop] Failed to converge after 100 iterations.

[qarmin]

Ruff 0.0.255
Command

ruff ~/Desktop/Ruff/Broken/AcquireFile6.py --config /home/rafal/Desktop/ruff.toml --fix --no-cache

Settings

select = ["ALL"]

AcquireFile6.py.zip

produce error

error: Failed to converge after 100 iterations.

This indicates a bug in `ruff`. If you could open an issue at:

    https://github.com/charliermarsh/ruff/issues/new?title=%5BInfinite%20loop%5D

...quoting the contents of `AcquireFile6.py`, along with the `pyproject.toml` settings and executed command, we'd be very appreciative!

[vlindhol]

I took a look at this, and managed to narrow it down to the following minimal test case:

class A:
    """
\ a
    """

With the config:

select = [
  "D207", # bad docstring indentation
  "W605", # invalid escape sequence
]

Those two rules clash in the following way

1. W605 schedules an insertion of a \ at column 0
2. D207 schedules an insertion of .... (four spaces) at column 0
3. End result: \ a -> \ + + \ a -> \ \ a
4. GOTO 1

The culprit is the fairly simplistic way that "fix overlaps" are calculated. An easy workaround is for W605 to insert the \ in column 1 instead. I'll make a PR about it!

[charliermarsh]

Thank you ❤️