INTERNAL ERROR: Black produced different code on the second pass of the formatter.

[felixhekhorn]

Describe the bug INTERNAL ERROR: Black produced different code on the second pass of the formatter.

To Reproduce Steps to reproduce the behavior:

1. Take this snippet

def test_ad_to_evol_map():
    triv_ops = ("S.S", "S.g", "g.S", "g.g", "V.V", "V3.V3", "T3.T3", "V8.V8", "T8.T8")
    # nf=3
    assert sorted(triv_ops) == get_ad_to_evol_map(3)
    # nf=3 + IC
    assert sorted(
        [*triv_ops, "T15.c+", "V15.c-"] #, "c+.c+"", "c-.c-"]
    ) == get_ad_to_evol_map(3, [4])
    # nf=3 + IC + IB
    assert sorted(
        [*triv_ops,"T15.c+", "V15.c-","b+.b+", "b-.b-"]#, "c+.c+"", "c-.c-", "b+.b+", "b-.b-"]
    ) == get_ad_to_evol_map(3, [4, 5])
    # nf=4 + IC + IB
    ks = sorted(
        [*triv_ops, "V15.V15", "T15.T15","T24.b+", "V24.b-"] # , "b+.b+", "b-.b-"]
    )
    assert ks == get_ad_to_evol_map(4, [4, 5])
    # nf=4 + IB
    assert ks == get_ad_to_evol_map(4, [5])
    # nf=6
    assert sorted(
        [*triv_ops, "T15.T15", "V15.V15", "T24.T24", "V24.V24", "T35.T35", "V35.V35"]
    ) == get_ad_to_evol_map(6)

2. Run Black on it with no arguments
3. See error

Expected behavior well formated code

Environment (please complete the following information):

• Version: 20.8b1
• OS and Python version: Python 3.8.7 (default, Jan 11 2021, 18:20:10) [GCC 10.2.1 20201224] on linux

Does this bug also happen on master? Yes

[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!