Bug#913622: dask: fails autopkgtest with cloudpickle 0.5.6-1
Since 2018-10-02, dask has been failing its autopkgtest .
This seems to correspond with the upload of cloudpickle 0.5.6-1 to unstable.
I've marked this bug serious since it might be causing a major problem
in dask, but please downgrade as appropriate.