Short code generates INTERNAL ERROR on second pass

[ochtersk]

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

To Reproduce Steps to reproduce the behavior:

Enter this code:
class SciSigFig:
def dump(self):
numstr = str(self)
return ' xxxnumber:%s\n str(number):%s\n sfcode:%s\n sfid:%s\n sfcount:%s\n uexp:%s\n notation:%s' %
(self.number,numstr, self.sfcode,self.sfid,self.sfcount,self.uexp,self.notation)

into Black playground https://black.vercel.app/ (accessed 11:40 EDT 04-12-2021)

** Error message:**
INTERNAL ERROR: Black produced different code on the second pass of the formatter. Please report a bug on https://github.com/psf/black/issues. This diff might be helpful: /tmp/blk_6fjvz6ci.log

Mode(target_versions=set(), line_length=88, string_normalization=True, experimental_string_processing=False, is_pyi=False)
--- source
+++ first pass
@@ -1,6 +1,15 @@
class SciSigFig:
def dump(self):
numstr = str(self)

•    return '  xxxnumber:%s\n str(number):%s\n      sfcode:%s\n        sfid:%s\n     sfcount:%s\n        uexp:%s\n    notation:%s' % \
  

•        (self.number,numstr, self.sfcode,self.sfid,self.sfcount,self.uexp,self.notation)
  

•    return (
  

•        "  xxxnumber:%s\n str(number):%s\n      sfcode:%s\n        sfid:%s\n     sfcount:%s\n        uexp:%s\n    notation:%s"
  

•        % (
  

•            self.number,
  

•            numstr,
  

•            self.sfcode,
  

•            self.sfid,
  

•            self.sfcount,
  

•            self.uexp,
  

•            self.notation,
  

•        )
  

•    )
  

--- first pass
+++ second pass
@@ -1,15 +1,12 @@
class SciSigFig:
def dump(self):
numstr = str(self)

•    return (
  

•        "  xxxnumber:%s\n str(number):%s\n      sfcode:%s\n        sfid:%s\n     sfcount:%s\n        uexp:%s\n    notation:%s"
  

•        % (
  

•            self.number,
  

•            numstr,
  

•            self.sfcode,
  

•            self.sfid,
  

•            self.sfcount,
  

•            self.uexp,
  

•            self.notation,
  

•        )
  

•    return "  xxxnumber:%s\n str(number):%s\n      sfcode:%s\n        sfid:%s\n     sfcount:%s\n        uexp:%s\n    notation:%s" % (
  

•        self.number,
  

•        numstr,
  

•        self.sfcode,
  

•        self.sfid,
  

•        self.sfcount,
  

•        self.uexp,
  

•        self.notation,
     )
  

Expected behavior A clear and concise description of what you expected to happen.

Expected reformatted code

Environment (please complete the following information):

• Version: [e.g. master]
• OS and Python version: [e.g. Linux/Python 3.7.4rc1]

Does this bug also happen on master? To answer this, you have two options:

1. Use the online formatter at https://black.now.sh/?version=master, which will use the
   latest master branch.

Yes, it occurs on the master

[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!