copy queryset throwing backtrace

Tried running the following command

ecl queries copy-set //10.173.153.101:8010/roxie_153 roxie_160 -v -s 10.173.160.101

and received the following errors:

Exception(s):
3000: assert(SELF::isItem(pos)) failed - file: jarray.hpp, line 266

Queries copied:
none

Queries already on destination target:
none

afishbeck stuartort gfortil

From the logs:

000011C9 2019-11-18 07:47:41.641 68625 10763 "Client version: 1.77"
000011CA 2019-11-18 07:47:41.641 68625 10763 "clo copying queryset roxie_160 from 10.173.153.101:8010 target roxie_153"
000011CB 2019-11-18 07:47:47.728 68625 10763 "Backtrace:"
000011CC 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libjlib.so(_Z16printStackReportx+0x45) [0x7f32064cb995]"
000011CD 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libjlib.so(_Z20raiseAssertExceptionPKcS0_j+0x83) [0x7f32064cbc23]"
000011CE 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_fs.so(_ZNK7ArrayOfIPKcS1_24StringPointerArrayMapperE4itemEj+0x40) [0x7f31fc875b38]"
000011CF 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(ZN16SoapEnumParamNewI19CErrorMessageFormatE8marshallER11IRpcMessagePKcS5_S5_S5_S5+0x4a) [0x7f31e35a4518]"
000011D0 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(_ZN12ws_workunits17CWULogFileRequest9serializeER11IRpcMessage+0x627) [0x7f31e338f03b]"
000011D1 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(ZN19CSoapRequestBinding4postEPKcS1_R19IRpcResponseBindingS1+0x2f2) [0x7f320c361d02]"
000011D2 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(_ZN12ws_workunits18CClientWsWorkunits6WUFileEP23IClientWULogFileRequest+0x1b9) [0x7f31e354391b]"
000011D3 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(Z19fetchRemoteWorkunitP18IClientWsWorkunitsP11IEspContextPKcS4_S4_S4_R12StringBufferS6_S6_R12MemoryBufferS6+0x7d) [0x7f31e370f6cd]"
000011D4 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(_ZN11QueryCloner16cloneQueryRemoteEP13IPropertyTreeb+0x13f) [0x7f31e37238bf]"
000011D5 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(_ZN14CWsWorkunitsEx16onWUCopyQuerySetER11IEspContextR25IEspWUCopyQuerySetRequestR26IEspWUCopyQuerySetResponse+0x5ef) [0x7f31e371ff1f]"
000011D6 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libws_workunits.so(ZN12ws_workunits23CWsWorkunitsSoapBinding14processRequestEP11IRpcMessageS2+0x3f0d) [0x7f31e34f318f]"
000011D7 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(ZN12CSoapService14processRequestER12ISoapMessageS1+0x68e) [0x7f320c36cfbe]"
000011D8 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN16CHttpSoapBinding17HandleSoapRequestEP12CHttpRequestP13CHttpResponse+0x30a) [0x7f320c360dba]"
000011D9 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN16CHttpSoapBinding13onSoapRequestEP12CHttpRequestP13CHttpResponse+0x56) [0x7f320c362486]"
000011DA 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN14EspHttpBinding14handleHttpPostEP12CHttpRequestP13CHttpResponse+0xeb) [0x7f320c335ecb]"
000011DB 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN14CEspHttpServer14processRequestEv+0x987) [0x7f320c3491a7]"
000011DC 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN11CHttpThread9onRequestEv+0xcb) [0x7f320c33c9cb]"
000011DD 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libesphttp.so(_ZN18CEspProtocolThread3runEv+0x95) [0x7f320c379b35]"
000011DE 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libjlib.so(_ZN6Thread5beginEv+0x28) [0x7f3206584428]"
000011DF 2019-11-18 07:47:47.734 68625 10763 " /opt/HPCCSystems/lib/libjlib.so(_ZN6Thread11_threadmainEPv+0x1d) [0x7f3206585b2d]"
000011E0 2019-11-18 07:47:47.734 68625 10763 " /lib64/libpthread.so.0(+0x7e65) [0x7f3204620e65]"
000011E1 2019-11-18 07:47:47.734 68625 10763 " /lib64/libc.so.6(clone+0x6d) [0x7f320434988d]"
000011E2 2019-11-18 07:47:47.734 68625 10763 "assert(SELF::isItem(pos)) failed - file: jarray.hpp, line 266"
000011E3 2019-11-18 07:47:47.822 68625 10763 "Exception(s) in WsWorkunits::WUCopyQuerySet - [3000: assert(SELF::isItem(pos)) failed - file: jarray.hpp, line 266]