DELETE /settings/security/* crashes

curl -v -u Administrator:'<password>' -X DELETE 'http://127.0.0.1:8091/settings/security/clusterManager'

...

< HTTP/1.1 500 Internal Server Error

...

["Unexpected server error, request logged."] 

** Reason for termination ==

** {function_clause,[{ejson,as_binary,

                            [{security_settings,ns_server}],

                            [{file,"/Users/timofey.barmin/neo/couchdb/src/ejson/ejson.erl"},

                             {line,101}]},

                     {ejson,encode_proplist_rev,2,

                            [{file,"/Users/timofey.barmin/neo/couchdb/src/ejson/ejson.erl"},

                             {line,96}]},

                     {ejson,encode_proplist_rev,2,

                            [{file,"/Users/timofey.barmin/neo/couchdb/src/ejson/ejson.erl"},

                             {line,99}]},

                     {ejson,nif_encode,1,

                            [{file,"/Users/timofey.barmin/neo/couchdb/src/ejson/ejson.erl"},

                             {line,52}]},

                     {ns_audit,handle_call,3,

                               [{file,"src/ns_audit.erl"},{line,151}]},

                     {gen_server,try_handle_call,4,

                                 [{file,"gen_server.erl"},{line,1149}]},

                     {gen_server,handle_msg,6,

                                 [{file,"gen_server.erl"},{line,1178}]},

                     {proc_lib,init_p_do_apply,3,

                               [{file,"proc_lib.erl"},{line,240}]}]}

** Client <0.909.0> stacktrace

** [{gen,do_call,4,[{file,"gen.erl"},{line,256}]},

    {gen_server,call,2,[{file,"gen_server.erl"},{line,366}]},

    {ns_audit,put,3,[{file,"src/ns_audit.erl"},{line,462}]},

    {menelaus_web_settings,handle_delete,3,

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

                            {line,788}]},

    {request_tracker,request,2,[{file,"src/request_tracker.erl"},{line,40}]},

    {menelaus_util,handle_request,2,

                   [{file,"src/menelaus_util.erl"},{line,222}]},

    {mochiweb_http,headers,6,

                   [{file,"/Users/timofey.barmin/neo/couchdb/src/mochiweb/mochiweb_http.erl"},

                    {line,153}]},

    {proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,240}]}]