Bug#1018939: zarr: autopkgtest regression on s390x

[Graham Inggs <ginggs@debian.org>]

Source: zarr
Version: 2.11.1+ds-1
X-Debbugs-CC: debian-s390@lists.debian.org
Severity: important
User: debian-ci@lists.debian.org
Usertags: regression

Hi Maintainer

zarr's autopkgtests started failing on the big-endian s390x
architecture [1], where they passed previously.  I've copied what I
hope is the relevant part of the log below.

Regards
Graham


[1] https://ci.debian.net/packages/z/zarr/testing/s390x/


=================================== FAILURES ===================================
________________ TestArrayWithCustomMapping.test_nbytes_stored _________________

self = <zarr.tests.test_core.TestArrayWithCustomMapping
testMethod=test_nbytes_stored>

    def test_nbytes_stored(self):
        z = self.create_array(shape=1000, chunks=100)
        assert 245 == z.nbytes_stored
        z[:] = 42
>       assert 515 == z.nbytes_stored
E       assert 515 == 495
E        +  where 495 = <zarr.core.Array (1000,) float64>.nbytes_stored

/usr/lib/python3/dist-packages/zarr/tests/test_core.py:2403: AssertionError