After running rs.stepDown() on the primary the primary crashes with the following output at the tail of the log:
2018-10-30T16:04:18.438-0400 I NETWORK [conn71] received client metadata from 192.168.0.122:63244 conn71: { driver: { name: "mongo-csharp-driver", version: "0.0.0.0" }, os: { type: "Windows", name: "Microsoft Windows 10.0.17134", architecture: "x86_32", version: "10.0.17134" }, platform: ".NET Framework 4.7.3190.0" } 2018-10-30T16:04:18.439-0400 F - [conn71] Invariant failure pin == ErrorCodes::CursorNotFound || pin == ErrorCodes::Unauthorized src\mongo\db\cursor_manager.cpp 186 2018-10-30T16:04:18.443-0400 F - [conn71] ***aborting after invariant() failure 2018-10-30T16:04:18.547-0400 F - [conn71] Got signal: 22 (SIGABRT). mongod.exe ...\src\mongo\util\stacktrace_windows.cpp(244) mongo::printStackTrace+0x67x mongod.exe ...\src\mongo\util\signal_handlers_synchronous.cpp(182) mongo::`anonymous namespace'::printSignalAndBacktrace+0x116x mongod.exe ...\src\mongo\util\signal_handlers_synchronous.cpp(238) mongo::`anonymous namespace'::abruptQuit+0x133x ucrtbase.dll raise+0x475x ucrtbase.dll abort+0x49x mongod.exe ...\src\mongo\util\assert_util.cpp(104) mongo::invariantFailed+0x410x mongod.exe ...\src\mongo\db\cursor_manager.cpp(186) mongo::`anonymous namespace'::GlobalCursorIdCache::killCursor+0x208x mongod.exe ...\src\mongo\db\cursor_manager.cpp(371) mongo::CursorManager::killCursorGlobalIfAuthorized+0x73x mongod.exe ...\src\mongo\db\service_entry_point_common.cpp(1127) mongo::`anonymous namespace'::receivedKillCursors+0x613x mongod.exe ...\src\mongo\db\service_entry_point_common.cpp(1339) mongo::ServiceEntryPointCommon::handleRequest+0x1313x mongod.exe ...\src\mongo\db\service_entry_point_mongod.cpp(123) mongo::ServiceEntryPointMongod::handleRequest+0x67x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(378) mongo::ServiceStateMachine::_processMessage+0x479x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(440) mongo::ServiceStateMachine::_runNextInGuard+0x207x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(479) <lambda_b23af5efc3b61ab25bff0c3bcd13382b>::operator()+0x109x mongod.exe ...\src\mongo\transport\service_executor_synchronous.cpp(116) mongo::transport::ServiceExecutorSynchronous::schedule+0x283x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(483) mongo::ServiceStateMachine::_scheduleNextWithGuard+0x236x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(303) mongo::ServiceStateMachine::_sourceCallback+0x289x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(259) <lambda_5e72c1d9f04187bee457482c0afa7487>::operator()+0x185x mongod.exe ...\src\mongo\util\future.h(788) mongo::future_details::Future<mongo::Message>::getAsync<<lambda_5e72c1d9f04187bee457482c0afa7487> >+0x103x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(254) mongo::ServiceStateMachine::_sourceMessage+0x192x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(436) mongo::ServiceStateMachine::_runNextInGuard+0x242x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(479) <lambda_b23af5efc3b61ab25bff0c3bcd13382b>::operator()+0x109x mongod.exe ...\src\mongo\transport\service_executor_synchronous.cpp(133) <lambda_472996f9e6b00ec91d31b43a6cde81f7>::operator()+0x217x mongod.exe c:\program files (x86)\microsoft visual studio 14.0\vc\include\thr\xthread(247) std::_LaunchPad<std::unique_ptr<std::tuple<std::function<void __cdecl(void)> >,std::default_delete<std::tuple<std::function<void __cdecl(void)> > > > >::_Run+0x133x mongod.exe c:\program files (x86)\microsoft visual studio 14.0\vc\include\thr\xthread(210) std::_Pad::_Call_func+0x9x ucrtbase.dll o_ceil+0x78x KERNEL32.DLL BaseThreadInitThunk+0x20x 2018-10-30T16:04:18.553-0400 F CONTROL [conn71] *** unhandled exception 0x0000000E at 0x00007FFDB0F9A388, terminating 2018-10-30T16:04:18.553-0400 F CONTROL [conn71] *** stack trace for unhandled exception: 2018-10-30T16:04:18.556-0400 I - [conn71] KERNELBASE.dll RaiseException+0x104x mongod.exe ...\src\mongo\util\signal_handlers_synchronous.cpp(239) mongo::`anonymous namespace'::abruptQuit+0x157x ucrtbase.dll raise+0x475x ucrtbase.dll abort+0x49x mongod.exe ...\src\mongo\util\assert_util.cpp(104) mongo::invariantFailed+0x410x mongod.exe ...\src\mongo\db\cursor_manager.cpp(186) mongo::`anonymous namespace'::GlobalCursorIdCache::killCursor+0x208x mongod.exe ...\src\mongo\db\cursor_manager.cpp(371) mongo::CursorManager::killCursorGlobalIfAuthorized+0x73x mongod.exe ...\src\mongo\db\service_entry_point_common.cpp(1127) mongo::`anonymous namespace'::receivedKillCursors+0x613x mongod.exe ...\src\mongo\db\service_entry_point_common.cpp(1339) mongo::ServiceEntryPointCommon::handleRequest+0x1313x mongod.exe ...\src\mongo\db\service_entry_point_mongod.cpp(123) mongo::ServiceEntryPointMongod::handleRequest+0x67x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(378) mongo::ServiceStateMachine::_processMessage+0x479x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(440) mongo::ServiceStateMachine::_runNextInGuard+0x207x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(479) <lambda_b23af5efc3b61ab25bff0c3bcd13382b>::operator()+0x109x mongod.exe ...\src\mongo\transport\service_executor_synchronous.cpp(116) mongo::transport::ServiceExecutorSynchronous::schedule+0x283x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(483) mongo::ServiceStateMachine::_scheduleNextWithGuard+0x236x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(303) mongo::ServiceStateMachine::_sourceCallback+0x289x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(259) <lambda_5e72c1d9f04187bee457482c0afa7487>::operator()+0x185x mongod.exe ...\src\mongo\util\future.h(788) mongo::future_details::Future<mongo::Message>::getAsync<<lambda_5e72c1d9f04187bee457482c0afa7487> >+0x103x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(254) mongo::ServiceStateMachine::_sourceMessage+0x192x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(436) mongo::ServiceStateMachine::_runNextInGuard+0x242x mongod.exe ...\src\mongo\transport\service_state_machine.cpp(479) <lambda_b23af5efc3b61ab25bff0c3bcd13382b>::operator()+0x109x mongod.exe ...\src\mongo\transport\service_executor_synchronous.cpp(133) <lambda_472996f9e6b00ec91d31b43a6cde81f7>::operator()+0x217x mongod.exe c:\program files (x86)\microsoft visual studio 14.0\vc\include\thr\xthread(247) std::_LaunchPad<std::unique_ptr<std::tuple<std::function<void __cdecl(void)> >,std::default_delete<std::tuple<std::function<void __cdecl(void)> > > > >::_Run+0x133x mongod.exe c:\program files (x86)\microsoft visual studio 14.0\vc\include\thr\xthread(210) std::_Pad::_Call_func+0x9x ucrtbase.dll o_ceil+0x78x KERNEL32.DLL BaseThreadInitThunk+0x20x 2018-10-30T16:04:18.561-0400 I CONTROL [conn71] writing minidump diagnostic file C:\mongodb\v4.2018-10-30T20-04-18.mdmp 2018-10-30T16:04:18.674-0400 I REPL [rsBackgroundSync] sync source candidate: Fractal:27017 2018-10-30T16:04:18.675-0400 I ASIO [RS] Connecting to Fractal:27017 2018-10-30T16:04:18.678-0400 F CONTROL [conn71] *** immediate exit due to unhandled exception