httpSess coredump just appeared

$ gdb /sbbs/exec/sbbs '/tmp/core.sbbs!httpSess.3560723'

[Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/sbbs/exec/sbbs d'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 120 ../sysdeps/x86_64/multiarch/../strlen.S: No such file or directory. [Current thread is 1 (Thread 0x7f7ccadfa700 (LWP 3676796))]

(gdb) bt #0 __strlen_sse2 () at ../sysdeps/x86_64/multiarch/../strlen.S:120 #1 0x00007f7d8f1fdd15 in __vfprintf_internal (s=s@entry=0x7f7ccadf3e80, format=format@entry=0x7f7d8fb9a5f1 "%ld\t%s\t%s\t%s\t%s\t%u\t%lu", ap=ap@entry=0x7f7ccadf3ff0, mode_flags=mode_flags@entry=0) at vfprintf-internal.c:1688 #2 0x00007f7d8f210bca in __vasprintf_internal (result_ptr=0x7f7ccadf3fe0, format=0x7f7d8fb9a5f1 "%ld\t%s\t%s\t%s\t%s\t%u\t%lu", args=0x7f7ccadf3ff0, mode_flags=0) at vasprintf.c:57 #3 0x00007f7d8fb6c993 in strListAppendFormat (list=0x7f7ccadf4110, format=0x7f7d8fb9a5f1 "%ld\t%s\t%s\t%s\t%s\t%u\t%lu") at str_list.c:321 #4 0x00007f7d8f6a66f5 in mqtt_client_on (mqtt=0x7f7d8f43b440 , on=0, sock=141, client=0x0, update=0) at mqtt.c:628 #5 0x00007f7d8f40a356 in client_off (sock=141) at websrvr.c:772 #6 0x00007f7d8f4203be in http_session_thread (arg=0x0) at websrvr.c:6776 #7 0x00007f7d8f37f609 in start_thread (arg=) at pthread_create.c:477 #8 0x00007f7d8f2a4133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb)