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Bug#1001410: python-csb: (autopkgtest) needs update for python3.10: TypeError: multiple bases have instance lay-out conflict

Source: python-csb
Version: 1.2.5+dfsg-6
Severity: serious
X-Debbugs-CC: debian-ci@lists.debian.org
Tags: sid bookworm
User: debian-ci@lists.debian.org
Usertags: needs-update
User: debian-python@lists.debian.org
Usertags: python3.10
Control: affects -1 src:python3-defaults

Dear maintainer(s),

We are in the transition of adding python3.10 to the supported Python versions [0]. With a recent upload of python3-defaults the autopkgtest of python-csb fails in testing when that autopkgtest is run with the binary packages of python3-defaults from unstable. It passes when run with only packages from testing. In tabular form:

                       pass            fail
python3-defaults       from testing    3.9.8-1
python-csb             from testing    1.2.5+dfsg-6
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 of python3-defaults to testing [1]. https://docs.python.org/3/whatsnew/3.10.html lists what's new in Python3.10, it may help to identify what needs to be updated.

More information about this bug and the reason for filing it can be found on


[1] https://qa.debian.org/excuses.php?package=python3-defaults


/usr/lib/python3/dist-packages/csb/test/__init__.py:162: DeprecationWarning: the imp module is deprecated in favour of importlib and slated for removal in Python 3.12; see the module's documentation for alternative uses
  import imp
Traceback (most recent call last):
File "/tmp/autopkgtest-lxc.4e8yo8la/downtmp/autopkgtest_tmp/test/app.py", line 5, in <module>
    from csb.test import Console
File "/usr/lib/python3/dist-packages/csb/test/__init__.py", line 446, in <module>
    class InvalidNamespaceError(NameError, ImportError):
TypeError: multiple bases have instance lay-out conflict
autopkgtest [13:26:23]: test build

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