Add tests for broken use of nearest.
Add tests for broken use of nearest.

hainm/dask,pombredanne/dask,simudream/dask,wiso/dask,marianotepper/dask,mikegraham/dask,mrocklin/dask,jayhetee/dask,minrk/dask,freeman-lab/dask,PhE/dask,marianotepper/dask,cpcloud/dask,PhE/dask,mrocklin/dask,mraspaud/dask,mraspaud/dask,simudream/dask,clarkfitzg/dask,blaze/dask,clarkfitzg/dask,vikhyat/dask,jakirkham/dask,blaze/dask,dask/dask,jakirkham/dask,vikhyat/dask,ContinuumIO/dask,pombredanne/dask,esc/dask,ssanderson/dask,gameduell/dask,freeman-lab/dask,wiso/dask,ssanderson/dask,jayhetee/dask,hainm/dask,jcrist/dask,esc/dask,minrk/dask,ContinuumIO/dask,dask/dask,chrisbarber/dask,cowlicks/dask,jcrist/dask