autopkgtest segfault in test_from_array.py on s390x

[Bryce Harrington]

pygalmesh 0.6.6-1 has failed its autopkgtest since this version was added on 2020-05-12. Runs against the prior version, 0.6.2-1, pass. Runs against architectures other than s390x also pass.

  https://autopkgtest.ubuntu.com/packages/p/pygalmesh/groovy/s390x

The error log shows:

============================= test session starts ==============================
platform linux -- Python 3.8.6rc1, pytest-4.6.11, py-1.9.0, pluggy-0.13.0
rootdir: /tmp/autopkgtest.bPEOpQ/build.W41/src
collected 29 items

test/test_from_array.py .bash: line 1: 4218 Segmentation fault (core dumped) bash -ec 'pytest-3' 2> >(tee -a /tmp/autopkgtest.bPEOpQ/command1-stderr >&2) > >(tee -a /tmp/autopkgtest.bPEOpQ/command1-stdout)
autopkgtest [15:45:33]: test command1: -----------------------]
autopkgtest [15:45:33]: test command1: - - - - - - - - - - results - - - - - - - - - -
command1 FAIL non-zero exit status 139
autopkgtest [15:45:34]: @@@@@@@@@@@@@@@@@@@@ summary
command1 FAIL non-zero exit status 139

https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-groovy/groovy/s390x/p/pygalmesh/20200923_154547_662c2@/log.gz

The issue has been reported upstream:

  https://github.com/nschloe/pygalmesh/issues/111

[Bryce Harrington (bryce)]

A next action for this might be to reproduce on s390x and get a full stacktrace on the segmentation fault.

I'm guessing this is a "big endian" bug exposed in code changed between 0.6.2 and 0.6.6.