TST: test_info_preserved_pickle_copy_init failed on s390x with TypeError: data type 'void40' not understood #11339

________________ test_info_preserved_pickle_copy_init[ndarray] _________________

mixin_cols = OrderedDict([('i', <Column name='i' dtype='int64' format='{0}' description='d' length=4>
0
1
2
3), ('a', <Column name=..., ('m', NdarrayMixin([(7, b'a'), (8, b'b'), (9, b'c'), (9, b'c')],
             dtype=[('f0', '<i4'), ('f1', 'S1')]))])

    def test_info_preserved_pickle_copy_init(mixin_cols):
        """
        Test copy, pickle, and init from class roundtrip preserve info.  This
        tests not only the mixin classes but a regular column as well.
        """
        def pickle_roundtrip(c):
            return pickle.loads(pickle.dumps(c))
    
        def init_from_class(c):
            return c.__class__(c)
    
        attrs = ('name', 'unit', 'dtype', 'format', 'description', 'meta')
        for colname in ('i', 'm'):
            m = mixin_cols[colname]
            m.info.name = colname
            m.info.format = '{0}'
            m.info.description = 'd'
            m.info.meta = {'a': 1}
            for func in (copy.copy, copy.deepcopy, pickle_roundtrip, init_from_class):
                m2 = func(m)
                for attr in attrs:
                    if (attr != 'dtype'
                            or getattr(m.info.dtype, 'isnative', True)
                            or func in (copy.copy, copy.deepcopy)):
                        original = getattr(m.info, attr)
                    else:
                        # func does not preserve byteorder, check against (native) base type.
                        original = m.info.dtype.name
>                   assert getattr(m2.info, attr) == original
E                   TypeError: data type 'void40' not understood

astropy/table/tests/test_mixin.py:450: TypeError