[sr-dev] Kamailio 5.1 nightly (rc2) crashing - udp_rcv_loop(): print buffer building failed

Hello, I've just installed kamailio 5.1 nightly from the debian repo for stretch. I didn't change anything in the configuration compared to 5.0.4 (which I was testing previously), apart from the database structure as found in the wiki for upgrading from 5.0.x. Now kamailio crashes after a while, with the following output in the logs: Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 3(2502) ERROR: <core> [core/udp_server.c:481]: udp_rcv_loop(): print buffer building failed Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 121(2620) CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 26 Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 121(2620) DEBUG: <core> [core/tcp_main.c:3512]: handle_ser_child(): dead child 3, pid 2502 (shutting down?) Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 121(2620) DEBUG: <core> [core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0x55ae7132ffc0, 26, -1, 0x0) fd_no=126 called Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 0(2499) ALERT: <core> [main.c:741]: handle_sigs(): child process 2502 exited normally, status=255 Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 0(2499) INFO: <core> [main.c:771]: handle_sigs(): terminating due to SIGCHLD Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 0(2499) DEBUG: <core> [main.c:773]: handle_sigs(): terminating due to SIGCHLD Nov 29 15:47:05 modcom-sbc-dev1 kamailio[2497]: 118(2617) INFO: <core> [main.c:826]: sig_usr(): signal 15 received Let me know if I can somehow help dissect this issue, I don't really know where to start. Thanks. BR, George