Bug#1004094: pillow breaks python-imageio autopkgtest: assert (150, 200, 3) == (150, 200, 4)

[Paul Gevers]

Source: pillow, python-imageio
Control: found -1 pillow/9.0.0-1
Control: found -1 python-imageio/2.4.1-3
Severity: serious
Tags: sid bookworm
X-Debbugs-CC: debian...@lists.debian.org
User: debian...@lists.debian.org
Usertags: breaks needs-update

Dear maintainer(s),



                       pass            fail
pillow                 from testing    9.0.0-1
python-imageio         from testing    2.4.1-3
all others             from testing    from testing

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



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=pillow

https://ci.debian.net/data/autopkgtest/testing/ppc64el/p/python-imageio/18424529/log.gz



    def test_animated_gif():
            # Read newton's cradle
        ims = imageio.mimread("imageio:newtonscradle.gif")
        assert len(ims) == 36
        for im in ims:

With a recent upload of pillow the autopkgtest of python-imageio fails in testing when that autopkgtest is run with the binary packages of pillow from unstable. It passes when run with only packages from testing. In tabular form: Currently this regression is blocking the migration of pillow to testing [1]. Due to the nature of this issue, I filed this bug report against both packages. Can you please investigate the situation and reassign the bug to the right package? =================================== FAILURES =================================== ______________________________ test_animated_gif _______________________________

          assert im.shape == (150, 200, 4)

E           assert (150, 200, 3) == (150, 200, 4)
E             At index 2 diff: 3 != 4
E             Full diff:
E             - (150, 200, 4)
E             ?            ^
E             + (150, 200, 3)
E             ?            ^

test_pillow.py:256: AssertionError

test_bsdf.py: 12 warnings

    logger.warn("BSDF warning: no extension found for %r" % ext_id)

test_core.py: 4 warnings
test_dicom.py: 2 warnings
test_format.py: 4 warnings
test_grab.py: 2 warnings

    return importlib.find_loader(module_name) is not None

test_pillow.py::test_png

    warn("PIL PNG writer cannot produce interlaced images.")

-- Docs: https://docs.pytest.org/en/stable/warnings.html

autopkgtest [08:06:23]: test command1

=============================== warnings summary =============================== /usr/lib/python3/dist-packages/imageio/plugins/_bsdf.py:418: DeprecationWarning: The 'warn' method is deprecated, use 'warning' instead /usr/lib/python3/dist-packages/imageio/core/util.py:562: DeprecationWarning: Deprecated since Python 3.4. Use importlib.util.find_spec() instead. /usr/lib/python3/dist-packages/imageio/plugins/pillow.py:317: UserWarning: PIL PNG writer cannot produce interlaced images. =========================== short test summary info ============================ FAILED test_pillow.py::test_animated_gif - assert (150, 200, 3) == (150, 200, 4) ====== 1 failed, 53 passed, 67 skipped, 3 xfailed, 25 warnings in 24.04s =======

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