Bug#1050526: dask: autopkgtest regression on s390x

[Paul Gevers]

Source: dask
Version: 2023.8.0+dfsg-1
Severity: serious
User: debian...@lists.debian.org
Usertags: regression

Dear maintainer(s),



                       pass            fail
dask                   from testing    2023.8.0+dfsg-1
all others             from testing    from testing





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=dask

https://ci.debian.net/data/autopkgtest/testing/s390x/d/dask/37104621/log.gz


700s
700s     def test_with_spec_integer_method():

700s
700s         spec = DatasetSpec(
700s             npartitions=1,
700s             nrecords=5,
700s             column_specs=[
700s                 ColumnSpec(prefix="pois", dtype=int, method="poisson"),
700s                 ColumnSpec(prefix="norm", dtype=int, method="normal"),
700s                 ColumnSpec(prefix="unif", dtype=int, method="uniform"),

700s                 ColumnSpec(prefix="rand", dtype=int, random=True),
700s             ],
700s         )
700s         ddf = with_spec(spec, seed=42)
700s         res = ddf.compute()
700s >       assert res["pois1"].tolist() == [1002, 985, 947, 1003, 1017]

700s E         At index 0 diff: 1021 != 1002
700s E         Full diff:
700s E         - [1002, 985, 947, 1003, 1017]
700s E         + [1021, 1006, 1024, 1030, 930]
700s

With a recent upload of dask the autopkgtest of dask fails in testing on s390x when that autopkgtest is run with the binary packages of dask from unstable. It passes when run with only packages from testing. In tabular form: I copied some of the output at the bottom of this report. I note that s390x is our only big endian release architecture. Currently this regression is blocking the migration to testing [1]. Can you please investigate the situation and fix it? PS: the tests on armhf and i386 architectures regressed too about 8 months ago on what seems to be an 32 bit arch test problem 700s =================================== FAILURES =================================== 700s ________________________ test_with_spec_integer_method _________________________ 700s from dask.dataframe.io.demo import ColumnSpec, DatasetSpec, with_spec 700s ColumnSpec(prefix="binom", dtype=int, method="binomial", args=(100, 0.4)), 700s ColumnSpec(prefix="choice", dtype=int, method="choice", args=(10,)), 700s ColumnSpec(prefix="rand", dtype=int, random=True, low=0, high=10), 700s E assert [1021, 1006, 1024, 1030, 930] == [1002, 985, 947, 1003, 1017] 700s /usr/lib/python3/dist-packages/dask/dataframe/io/tests/test_demo.py:338: AssertionError

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