dask was released yesterday version: 2.26.0 and it breaks our test_read_vcfzarr. That same test works fine on 2.25.0.

Originally posted by @ravwojdyla in https://github.com/pystatgen/sgkit/pull/228#issuecomment-691538352

The issue seems to be that:

    ds["variant_id_mask"] = (
        [DIM_VARIANT],
        variants_id == ".",
    )

returns (['variants'], False) instead of array of bool as the 2nd element.