** Reason for termination ==
** {badarith,[{couch_view_group,sum_btree_sizes,2},
              {lists,foldl,3},
              {couch_view_group,get_group_info,1},
              {couch_view_group,handle_call,3},
              {gen_server,handle_msg,5},
              {proc_lib,init_p_do_apply,3}]}