[sr-dev] [kamailio/kamailio] NATS Module not working (Issue #3253)

[iliesh]

Hi @henningw ,

Please find the core dump below:

```
(gdb) bt
#0  0x00007fb35c0961cc in uv.io_stop () from /lib64/libuv.so.1
#1  0x00007fb35c09c71a in uv.poll_stop.lto_priv () from /lib64/libuv.so.1
#2  0x00007fb35c09c763 in uv_poll_stop () from /lib64/libuv.so.1
#3  0x00007fb35c146d3d in nats_destroy_workers () at nats_mod.c:591
#4  0x00007fb35c146dc0 in mod_destroy () at nats_mod.c:603
#5  0x0000000000636b22 in destroy_modules () at core/sr_module.c:842
#6  0x000000000041f059 in cleanup (show_status=0) at main.c:561
#7  0x0000000000420ac1 in shutdown_children (sig=15, show_status=0) at main.c:704
#8  0x0000000000439a81 in main (argc=5, argv=0x7ffd6bebd598) at main.c:3093
(gdb) bt full
#0  0x00007fb35c0961cc in uv.io_stop () from /lib64/libuv.so.1
No symbol table info available.
#1  0x00007fb35c09c71a in uv.poll_stop.lto_priv () from /lib64/libuv.so.1
No symbol table info available.
#2  0x00007fb35c09c763 in uv_poll_stop () from /lib64/libuv.so.1
No symbol table info available.
#3  0x00007fb35c146d3d in nats_destroy_workers () at nats_mod.c:591
        i = 0
        worker = 0x100000598
        pub_worker = 0x7fb35c256b20
        __func__ = "nats_destroy_workers"
#4  0x00007fb35c146dc0 in mod_destroy () at nats_mod.c:603
        __func__ = "mod_destroy"
#5  0x0000000000636b22 in destroy_modules () at core/sr_module.c:842
        t = 0x7fb36125b6a8
        foo = 0x7fb36125b1d0
        __func__ = "destroy_modules"
#6  0x000000000041f059 in cleanup (show_status=0) at main.c:561
        memlog = 0
        __func__ = "cleanup"
#7  0x0000000000420ac1 in shutdown_children (sig=15, show_status=0) at main.c:704
        __func__ = "shutdown_children"
#8  0x0000000000439a81 in main (argc=5, argv=0x7ffd6bebd598) at main.c:3093
        cfg_stream = 0x244d380
        c = -1
        r = 0
        tmp = 0xc5 <error: Cannot access memory at address 0xc5>
        tmp_len = 0
        port = 0
        proto = 0
        ahost = 0x0
        aport = 0
        options = 0x8152f8 ":f:cm:M:dVIhEeb:l:L:n:vKrRDTN:W:w:t:u:g:P:G:SQ:O:a:A:x:X:Y:"
        ret = -1
        seed = 4101768862
        rfd = 4
        debug_save = 0
        debug_flag = 0
        dont_fork_cnt = 0
        n_lst = 0x300000000
        p = 0x40 <error: Cannot access memory at address 0x40>
        st = {st_dev = 25, st_ino = 1402, st_nlink = 2, st_mode = 16832, st_uid = 1001, st_gid = 1002, __pad0 = 0, st_rdev = 0, st_size = 60, st_blksize = 4096, st_blocks = 0, st_atim = {tv_sec = 1663600770, tv_nsec = 489002484}, st_mtim = {tv_sec = 1664316775, tv_nsec = 681629684},
          st_ctim = {tv_sec = 1664316775, tv_nsec = 681629684}, __glibc_reserved = {0, 0, 0}}
        tbuf = "\342\214\317a\263\177\000\000\070K\314a\263\177\000\000\020\322\353k\375\177\000\000\a\000\000\000\000\000\000\000\330\070\314a\263\177\000\000\a\000\000\000#\000\000\000\060\232\317a\263\177\000\000\225f\315a\263\177\000\000\000\000\000\000\000\000\000\000\200y\315a\263\177\000\000\070\300\234a\263\177\000\000\320\035\314a\263\177\000\000\000\000\000\000\000\000\000\000\340\321\353k\375\177\000\000\360\216\317a\263\177\000\000\330J\314a\263\177\000\000\330J\314a\263\177\000\000\000\000\000\000\000\000\000\000\230,\314a\263\177\000\000\340\321\353k\375\177\000\000\220\245\317a\263\177\000\000\000\060\314a\263\177\000\000\022<\314a\263\177\000\000\066\061\315a\263\177\000\000\344\343\233a\263\177\000\000"...
        option_index = 0
        long_options = {{name = 0x817966 "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x812514 "version", has_arg = 0, flag = 0x0, val = 118}, {name = 0x81796b "alias", has_arg = 1, flag = 0x0, val = 1024}, {name = 0x817971 "subst", has_arg = 1, flag = 0x0, val = 1025}, {
            name = 0x817977 "substdef", has_arg = 1, flag = 0x0, val = 1026}, {name = 0x817980 "substdefs", has_arg = 1, flag = 0x0, val = 1027}, {name = 0x81798a "server-id", has_arg = 1, flag = 0x0, val = 1028}, {name = 0x817994 "loadmodule", has_arg = 1, flag = 0x0, val = 1029}, {
            name = 0x81799f "modparam", has_arg = 1, flag = 0x0, val = 1030}, {name = 0x8179a8 "log-engine", has_arg = 1, flag = 0x0, val = 1031}, {name = 0x8179b3 "debug", has_arg = 1, flag = 0x0, val = 1032}, {name = 0x8179b9 "cfg-print", has_arg = 0, flag = 0x0, val = 1033}, {
            name = 0x8179c3 "atexit", has_arg = 1, flag = 0x0, val = 1034}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
        __func__ = "main"
```

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