maxscale crash in worker

Crash under heavy insert load:

2019-09-03 14:23:46 info : (1) [readwritesplit] Reply complete, last reply from sctst6
2019-09-03 14:23:50 info : (1) > Autocommit: [disabled], trx is [open], cmd: (0x01) COM_QUIT, plen: 5, type: QUERY_TYPE_SESSION_WRITE, stmt:
2019-09-03 14:23:50 info : (1) [readwritesplit] Session write, routing to all servers.
2019-09-03 14:23:50 info : (1) [readwritesplit] Route query to master: sctst6 [192.168.212.44]:3306
2019-09-03 14:23:50 info : Stopped Read-Write-Dev client session [1]
2019-09-03 14:23:51 info : (2) [readwritesplit] Servers and router connection counts:
2019-09-03 14:23:51 info : (2) [readwritesplit] current operations : 0 in [192.168.212.44]:3306 Master, Running
2019-09-03 14:23:51 info : (2) [readwritesplit] Connected to 'sctst6'
2019-09-03 14:23:51 info : (2) [readwritesplit] Selected Master: sctst6
2019-09-03 14:23:51 info : (2) Started Read-Write-Dev client session [2] for 'plinel' from ::ffff:192.168.76.95
2019-09-03 14:23:51 info : (2) Connected to 'XXXXXXX' with thread id 17863
2019-09-03 14:23:51 info : (2) > Autocommit: [disabled], trx is [open], cmd: (0x03) COM_QUERY, plen: 21, type: QUERY_TYPE_GSYSVAR_WRITE|QUERY_TYPE_BEGIN_TRX|QUERY_TYPE_DISABLE_AUTOCOMMIT, stmt: set autocommit=0
2019-09-03 14:23:51 info : (2) [readwritesplit] Session write, routing to all servers.
2019-09-03 14:23:51 info : (2) [readwritesplit] Route query to master: sctst6 [192.168.212.44]:3306
2019-09-03 14:23:51 info : (2) [readwritesplit] Reply complete, last reply from sctst6
2019-09-03 14:24:42 alert : Fatal: MaxScale 2.4.1 received fatal signal 6. Attempting backtrace.
2019-09-03 14:24:42 alert : Commit ID: b47b7c15edbbc70d9137520e3c590c4f16b3a4eb System name: Linux Release string: CentOS Linux release 7.6.1810 (Core)
2019-09-03 14:24:42 alert : /lib64/libc.so.6(epoll_wait+0x33): :?
2019-09-03 14:24:42 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN7maxbase6Worker15poll_waiteventsEv+0xd0): maxutils/maxbase/src/worker.cc:795
2019-09-03 14:24:42 alert : /usr/lib64/maxscale/libmaxscale-common.so.1.0.0(_ZN7maxbase6Worker3runEPNS_9SemaphoreE+0x53): maxutils/maxbase/src/worker.cc:559
2019-09-03 14:24:42 alert : /usr/bin/maxscale(main+0x2a76): server/core/gateway.cc:2267
2019-09-03 14:24:42 alert : /lib64/libc.so.6(__libc_start_main+0xf5): ??:?
2019-09-03 14:24:42 alert : /usr/bin/maxscale(): ??:?