Seems like there's more to be done. We're getting a None here:

  File "/home/runner/work/mypy/mypy/mypy/fastparse.py", line 1960, in _extract_argument_name    return n.s.strip()

The mypy-primer hit also likely indicates a bug. It's something with type comments.

We dropped support for 3.7 by now, so this can probably be simplified; at least there's a big merge conflict now.

According tomypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅