...
Program terminated with signal 11, Segmentation fault.
...

(gdb) bt
#0  0x08097d82 in ast_cli_unregister_multiple (e=0xb7e0ab40, len=0) at cli.c:1030
#1  0xb7dfa15b in __unload_module () at chan_zap.c:10242
#2  0x0805c182 in ast_unload_resource (resource_name=0x81324cf "chan_zap.so", force=0) at loader.c:175
#3  0x0805ce61 in __load_resource (resource_name=0x81324cf "chan_zap.so", cfg=0x19c) at loader.c:413
#4  0x0805d182 in load_modules (preload_only=135471736) at loader.c:446
#5  0x080c49d2 in main (argc=3, argv=0xbffffdd4) at asterisk.c:2349

#0  0x08097d82 in ast_cli_unregister_multiple (e=0xb7e0ab40, len=0) at cli.c:1030
No locals.
#1  0xb7dfa15b in __unload_module () at chan_zap.c:10242
        x = 0
        p = (struct zt_pvt *) 0xb7e0a980
        pl = (struct zt_pvt *) 0x5
        __PRETTY_FUNCTION__ = "__unload_module"
#2  0x0805c182 in ast_unload_resource (resource_name=0x81324cf "chan_zap.so", force=0) at loader.c:175
        m = (struct module_symbols *) 0x8151a7c
        __list_next = (struct module *) 0x0
        __list_prev = (struct module *) 0x8135f98
        cur = (struct module *) 0x8151a78
        res = 0
        error = 0
        __PRETTY_FUNCTION__ = "ast_unload_resource"
#3  0x0805ce61 in __load_resource (resource_name=0x81324cf "chan_zap.so", cfg=0x19c) at loader.c:413
        fn = "/usr/lib/asterisk/modules/chan_zap.so\000o\000o\000so", '\0' <repeats 204 times>
        errors = 0
        res = 0
        cur = (struct module *) 0x8151a78
        m = (struct module_symbols *) 0x8151a7c
        flags = 2
        key = (unsigned char *) 0x80f8d32 "loader.c"
        tmp = "\1772\023\b\r\000\000\000=\000\000\000\2142\023\b\002\000\000\b\b\n\000\000\000\000\000\000\030\000\000\000 \000\000\000\2142\023\b,/\023\b\b\n\000\000\000\000\000\000\221Þv\000\t\000\000\000\000\023\023\b\022\216\017\bÏ$\023\bx\"\023\bÜÙ\005\b"
        __PRETTY_FUNCTION__ = "__load_resource"
#4  0x0805d182 in load_modules (preload_only=135471736) at loader.c:446
        d = (struct dirent *) 0x0
        mods = (DIR *) 0x8132278
        base = 0x80f8cf3 "chan_"
        lx = 5
        cfg = (struct ast_config *) 0x8131be8
        v = (struct ast_variable *) 0x0
        x = 2
        __PRETTY_FUNCTION__ = "load_modules"
#5  0x080c49d2 in main (argc=3, argv=0xbffffdd4) at asterisk.c:2349
        gr = (struct group *) 0xd470000
        c = 0
        filename = "//.asterisk_history", '\0' <repeats 60 times>
        hostname = "voipbox", '\0' <repeats 49 times>
        tmp = "?\177\202\000\001\000\000\000\000\230\202\000\210??¿F\177v\000\000\230\202\000\033\000\000\000í\031\r\b?ñ?\000\
033\000\000\000@\005\023\bÁ??¿H\005\023\bzx\017\b???¿\212?\v\bH1\022\bÁ??¿\017\000\000\000\200\034p"
        xarg = 0x0
        x = 0
        f = (FILE *) 0xd470000
        sigs = {__val = {134238211, 0 <repeats 31 times>}}
        num = 7305910
        is_child_of_nonroot = 0
        buf = 0xd470000 <Address 0xd470000 out of bounds>
        runuser = 0x0
        rungroup = 0x0
        __PRETTY_FUNCTION__ = "main"