File fails to auto format with internal error

[ideasman42]

Describe the bug

Black fails to auto format a Python script, reporting an internal error.

To Reproduce

1. Take this file https://developer.blender.org/diffusion/B/browse/master/tests/python/bl_pyapi_mathutils.py;84c537e68528177ef982479f5884af07cec322b9
2. Run Black on it with these arguments black bl_pyapi_mathutils.py
3. See error:

error: cannot format bl_pyapi_mathutils.py: INTERNAL ERROR: Black produced different code on the second pass of the formatter.  Please report a bug on https://github.com/psf/black/issues.

Expected behavior Auto format without any errors.

Environment (please complete the following information):

• Version: 20.8b1 & master.
• Arch Linux, Python 3.9.2

Does this bug also happen on master?

Yes, the error happens on master dc8b0a4

Additional context

Don't think any is needed.

[ichard26]

Hello!

All reproduction cases in this issue format without error on master. The fixing commit was 8672af3 from PR GH-2126. I'll be marking this issue as a duplicate of GH-1629 since that's what GH-2126 aimed to fix and it's highly likely this issue falls under GH-1629.

Since we use the issue tracker as a reflection of what's on master, I'll be closing this issue. If you have any issues, especially with the new (but stable) output, please open a new issue. Oh and the fix should be available in a published release soon, see GH-2125 for more info.

Thank you for reporting!