TestReadPairs.test_select fails

[rekado]

In the build for GNU Guix we see a test failure in test_select when building the latest commit 354401e with Python 3.10. We run pytest with -m not longrunning --ignore=fanc/test/test_matrix.py. Here's the relevant test output:

__________________________ TestReadPairs.test_select ___________________________

self = <test_pairs.TestReadPairs object at 0x7ffdc5ca89d0>

    def test_select(self):
>       pair = self.pairs[11]

fanc/test/test_pairs.py:33: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/gnu/store/frv39wj991w2m2x5ays29fhl4lzk9nqb-fanc-0-1.354401e/lib/python3.10/site-packages/fanc/pairs.py:1943: in __getitem__
    edge = self.get_edge(item)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <fanc.pairs.ReadPairs object at 0x7ffdc5e88e50>, item = 11
row_conversion_args = (), row_conversion_kwargs = {}, l = 0, _ = (0, 0)
edge_table = /pairs/chrpair_0_0 (MaskedTable(0,), shuffle, blosc(1)) ''
  description := {
  "source": Int32Col(shape=(), dflt=0, p...ink": Index(6, medium, shuffle, zlib(1)).is_csi=False,
    "_mask_ix": Index(6, medium, shuffle, zlib(1)).is_csi=False}

    def get_edge(self, item, *row_conversion_args, **row_conversion_kwargs):
        """
        Get an edge by index.
    
        :param row_conversion_args: Arguments passed to :func:`RegionPairs._row_to_edge`
        :param row_conversion_kwargs: Keyword arguments passed to :func:`RegionPairs._row_to_edge`
        :return: :class:`~Edge`
        """
        if item < 0:
            item += len(self)
    
        l = 0
        for _, edge_table in self._iter_edge_tables():
            if l <= item < l + len(edge_table):
                res = edge_table[item - l]
                return self._row_to_edge(res, *row_conversion_args, **row_conversion_kwargs)
            l += len(edge_table)
>       raise IndexError("index out of range (%d)" % item)
E       IndexError: index out of range (11)