[Python-modules-team] Bug#946302: black: autopkgtest regression: No module named '_black_version'

[Paul Gevers]

Source: black
Version: 19.10b0-1
X-Debbugs-CC: debian-ci at lists.debian.org
User: debian-ci at lists.debian.org
Usertags: regression

Dear maintainers,

With a recent upload of black the autopkgtest of black fails in testing
when that autopkgtest is run with the binary packages of black from
unstable. It passes when run with only packages from testing. In tabular
form:
                       pass            fail
black                  from testing    19.10b0-1
all others             from testing    from testing

I copied some of the output at the bottom of this report.

Currently this regression is blocking the migration to testing [1]. Can
you please investigate the situation and fix it? If needed, please
change the bug's severity.

More information about this bug and the reason for filing it can be found on
https://wiki.debian.org/ContinuousIntegration/RegressionEmailInformation

Paul

[1] https://qa.debian.org/excuses.php?package=black

https://ci.debian.net/data/autopkgtest/testing/amd64/b/black/3595361/log.gz

autopkgtest [16:20:46]: test testsuite: [-----------------------
Traceback (most recent call last):
  File "setup.py", line 3, in <module>
    from _black_version import version as __version__
ModuleNotFoundError: No module named '_black_version'
autopkgtest [16:20:47]: test testsuite: -----------------------]

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