Hello!

I have an issue with kamailio 5.6.5 after some time of flying there are errors in logs:

<core> [core/mem/q_malloc.c:297]: qm_find_free(): qm_find_free(0x7fc79c286010, 536); Free fragment not found!

mem_join=1 by default, but it seems that MEM_JOIN_FREE flag is not defined in this build

kamailio -I
Print out of kamailio internals
  Version: kamailio 5.6.5 (x86_64/linux)
  Default config: /etc/kamailio/kamailio.cfg
  Default paths to modules: /usr/lib/x86_64-linux-gnu/kamailio/modules
  Compile flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
  MAX_RECV_BUFFER_SIZE=262144
  MAX_URI_SIZE=1024
  BUF_SIZE=65535
  DEFAULT PKG_SIZE=8MB
  DEFAULT SHM_SIZE=64MB
  ADAPTIVE_WAIT_LOOPS=1024
  TCP poll methods: poll, epoll_lt, epoll_et, sigio_rt, select
  Source code revision ID: unknown
  Compiled with: gcc 10.2.1
  Compiled architecture: x86_64
  Compiled on:
OS Debian 11 bullseye

However I noticed the flag exists in 5.7 installed from deb

and now, what got me bit confused is that when I build 5.6.5 from source "make printcdefs" gives me this flag, alongside with other flags which I do not see later in "kamailio -v" output.

So I am not sure whether this flag was defined during 5.6.5 deb build time or it has been somehow lost? 

So I need your advice.

Regards,

Arsen