From connection to crash, a complete process

[SeaAndSand]

Runtime environment: arm-linux
Version: 1.3.13

Code：https://github.com/SeaAndSand/mqtt_test/blob/main/mqtt_client.c
err.log：https://github.com/SeaAndSand/mqtt_test/blob/main/err.log

Why did it crash?

[16:31:19.839]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[4]: 20241225 163118.957 5 mqtt_client_local_ems <- PUBLISH msgid: 0 qos: 0 retained: 0 payload len(153): { "head": { "SID": "
[16:31:19.839]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163118.957 Calling messageArrived for client mqtt_client_local_ems, queue depth 0
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163118.957 m->c->connect_state = 0
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[1]: 20241225 163118.957 queueChar: index is now 1, headerlen 1
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[1]: 20241225 163118.957 queueChar: index is now 2, headerlen 2
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[1]: 20241225 163118.957 queueChar: index is now 3, headerlen 3
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[4]: 20241225 163118.957 6 1c8776585421 <- PUBLISH msgid: 9 qos: 2 retained: 0 payload len(836): {"head":{"SID":"HUAS
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163118.957 Calling messageArrived for client 1c8776585421, queue depth 0
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[4]: 20241225 163119.653 6 1c8776585421 -> PUBREC msgid: 9 (0)
[16:31:19.840]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 Socket error Broken pipe(32) in writev - putdatas for socket 5
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[4]: 20241225 163119.653 5 mqtt_client_local_ems -> PUBLISH msgid: 23 qos: 2 retained: 0 rc -1 payload len(836): {"head":{"SID":"HUAS
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 Calling command failure for client mqtt_client_local_ems
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: [tcp://localhost:1883] [mqtt_client_local_ems] Failed to send message
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 Socket error Broken pipe(32) in writev - putdatas for socket 5
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[4]: 20241225 163119.653 5 mqtt_client_local_ems -> DISCONNECT (-1)
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 Removed socket 5
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 Removed socket 5
[16:31:19.841]Dec 25 16:31:19 myimx6ek200-ecu user.info app_mqtt_bridge[1305]: Trace[3]: 20241225 163119.653 0 inflight messages deleted for client mqtt_client_local_ems

[icraggs]

I can't tell from this information. Is the scenario different at all from issue #1541? It evidently ends on a disconnection so there's obviously a connection problem, but I would need more - like where exactly did it crash for instance.

I can't build the application to try it out myself because there are header files and some functions not included.