[SR-Users] Guidance tracking down "qm_free(): BUG: freeing already freed pointer"

I'm seeking guidance on how to track down "qm_free(): BUG: freeing already freed pointer" which occurs only on branched calls. These errors don't crash so I don't get any core dumps. The different log entries below are the result of me selectively disabling sections of the script that apply in branch route, all to no avail. I'm running Kamailio on the current tip of the 5.5 branch (1f9f6fff6e). I'm reviewing https://www.kamailio.org/wiki/tutorials/troubleshooting/memory in the meantime as a place to start. version: kamailio 5.5.1-5.git1f9f6fff6e.fc34 (x86_64/linux) 7abebb 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 ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f04b8f47e90), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f04b8f06c70), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f08e8f9cf80), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f2afafa60d8), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/sdp/sdp.c: init_p_payload_attr(183) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f2afae2a018), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f2afae431e8), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f2afafa3900), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f5fd4044ef0), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7ffbb2d2e2f0), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f6d1a50b1d8), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc19c165c70), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc19c17adb8), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc19c125790), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f4d969c9d48), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc29bdca3d0), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc2c2eccc80), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fc2c2ec52c0), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f910c04e240), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fa351286b18), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fa3512a7ae8), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fa0777d9e70), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fa0777d7a80), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f4f2c92cf20), called from core: core/data_lump.c: free_lump(470), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f4f2c8afa00), called from core: core/data_lump.c: free_lump(470), first free textops: textops.c: add_hf_helper(3474) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f4f2c92aa48), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fe55825eb30), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/sdp/sdp.c: init_p_payload_attr(183) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f6526db8378), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fcd9b465980), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/hf.c: free_hdr_field_lst(217) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7ff7ca92ff60), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f978a2dc938), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f978a2b7eb8), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fa1556c1610), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fd81dfbba78), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fb2750d9988), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fb2750e1b28), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/parse_addr_spec.c: free_to_params(895) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f32f7b45d30), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/hf.c: free_hdr_field_lst(217) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f35849e1940), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/hf.c: free_hdr_field_lst(217) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7fd3a2c04280), called from core: core/parser/sdp/sdp.c: free_sdp(825), first free core: core/parser/msg_parser.c: reset_ua(994) - ignoring CRITICAL: <core> [core/mem/q_malloc.c:519]: qm_free(): BUG: freeing already freed pointer (0x7f5de857a040), called from core: core/parser/msg_parser.c: reset_instance(916), first free core: core/parser/hf.c: free_hdr_field_lst(217) - ignoring -- Anthony - https://messinet.com CCED 8BFB 88D9 18F6 9F68 93DC 45C4 A8CE A64E 88E3