bad_input = "[\"done\",[[0,\"ok\",\"bad\",[[0,\"disco://localhost/ddfs/vol0/blob/b\"]]]]]"
bad_input = "[\"done\",[[0,\"ok\",\"bad\",[[0,\"disco://localhost/ddfs/vol0/blob/b\"]]]]]"
bad_input = "[\"done\",[[0,\"ok\",\"bad\",[[0,\"disco://localhost/ddfs/vol0/blob/b\"]]]]]"