diag for babysitter processes is broken

per_node_babysitter_processes('ns_1@127.0.0.1') =

     {<11611.210.0>,

      {'EXIT',{badarg,[{ets,lookup,

                            [ns_config_ets_dup,sanitize_backtrace_registers],

                            []},

                       {ns_config,search,1,

                                  [{file,"src/ns_config.erl"},{line,457}]},

                       {ns_config,read_key_fast,2,

                                  [{file,"src/ns_config.erl"},{line,467}]},

                       {diag_handler,sanitize_backtrace,2,

                                     [{file,"src/diag_handler.erl"},

                                      {line,81}]},

                       {diag_handler,grab_process_info,1,

                                     [{file,"src/diag_handler.erl"},

                                      {line,141}]},

                       {diag_handler,grab_process_infos_loop,2,

                                     [{file,"src/diag_handler.erl"},

                                      {line,311}]},

                       {rpc,'-handle_call_call/6-fun-0-',5,

                            [{file,"rpc.erl"},{line,205}]}]}}}