bt:
(gdb) bt
#0  0x001bbd2e in SQLNumResultCols () from /usr/lib/libodbc.so.1
#1  0x00470424 in acf_odbc_read (chan=0xb7a120e0, cmd=0xb6359c20 "RT_EXTEN_SETTING", s=0xb6359c31 "4773103106", buf=0xb6358c10 "", len=4096) at func_odbc.c:289
#2  0x080d4281 in ast_func_read (chan=0xb7a120e0, function=0xb6359c20 "RT_EXTEN_SETTING", workspace=0xb6358c10 "", len=4096) at pbx.c:1555
#3  0x080d46d1 in pbx_substitute_variables_helper_full (c=0xb7a120e0, headp=0xb7a124e4, cp1=0xa319250 "VARIABEL=${RT_EXTEN_SETTING(4773103106|DN)}", cp2=0xb635ce11 "",
    count=8182) at pbx.c:1676
#4  0x080d4bc5 in pbx_substitute_variables_helper (c=0xb7a120e0, cp1=0xa319250 "VARIABEL=${RT_EXTEN_SETTING(4773103106|DN)}", cp2=0xb635ce08 "VARIABEL=", count=8191)
    at pbx.c:1770
#5  0x080d4ccc in pbx_substitute_variables (passdata=0xb635ce08 "VARIABEL=", datalen=8192, c=0xb7a120e0, e=0xa319280) at pbx.c:1788
#6  0x080d4ec2 in pbx_extension_helper (c=0xb7a120e0, con=0x0, context=0xb7a12320 "bugfinder", exten=0xb7a12370 "s", priority=2, label=0x0, callerid=0xb7a0be38 "",
    action=E_SPAWN) at pbx.c:1841
#7  0x080d6400 in ast_spawn_extension (c=0xb7a120e0, context=0xb7a12320 "bugfinder", exten=0xb7a12370 "s", priority=2, callerid=0xb7a0be38 "") at pbx.c:2332
#8  0x080d6846 in __ast_pbx_run (c=0xb7a120e0) at pbx.c:2421
#9  0x080d77fe in ast_pbx_run (c=0xb7a120e0) at pbx.c:2678
#10 0x080dd62c in ast_pbx_outgoing_exten (type=0xa25d690 "Console", format=72, data=0xa25d790, timeout=30000, context=0xa25db90 "bugfinder", exten=0xa25da90 "s", priority=1,
    reason=0xb635f32c, sync=2, cid_num=0xa25dc94 "", cid_name=0xa25dd94 "", vars=0x0, account=0xa25de94 "", channel=0x0) at pbx.c:5033
#11 0x005793af in attempt_thread (data=0xa25d578) at pbx_spool.c:353
#12 0x0811b4c5 in dummy_start (data=0xa2c3940) at utils.c:856
#13 0x0071746b in start_thread () from /lib/libpthread.so.0
#14 0x0066edbe in clone () from /lib/libc.so.6


bt full:
#0  0x001bbd2e in SQLNumResultCols () from /usr/lib/libodbc.so.1
No symbol table info available.
#1  0x00470424 in acf_odbc_read (chan=0xb7a120e0, cmd=0xb6359c20 "RT_EXTEN_SETTING", s=0xb6359c31 "4773103106", buf=0xb6358c10 "", len=4096) at func_odbc.c:289
        obj = (struct odbc_obj *) 0xa18b598
        query = (struct acf_odbc_query *) 0xa2020a0
        sql = "SELECT value FROM astdb WHERE family='4773103106/DN'", '\0' <repeats 1995 times>
        varname = "ARG2\000\000\000\000\000\000\000▒A,"
        res = 135643988
        x = 2
        buflen = 1
        escapecommas = 1
        bogus_chan = 0
        args = {argc = 2, argv = 0xb63581c8, field = {0xb6359c31 "4773103106", 0xb6359c3c "DN", 0x0 <repeats 98 times>}}
        stmt = (SQLHSTMT) 0xb7a1ffd0
        colcount = 0
        indicator = 0
        __PRETTY_FUNCTION__ = "acf_odbc_read"
#2  0x080d4281 in ast_func_read (chan=0xb7a120e0, function=0xb6359c20 "RT_EXTEN_SETTING", workspace=0xb6358c10 "", len=4096) at pbx.c:1555
        args = 0xb6359c31 "4773103106"
        acfptr = (struct ast_custom_function *) 0xa1fe6b8
        __PRETTY_FUNCTION__ = "ast_func_read"
#3  0x080d46d1 in pbx_substitute_variables_helper_full (c=0xb7a120e0, headp=0xb7a124e4, cp1=0xa319250 "VARIABEL=${RT_EXTEN_SETTING(4773103106|DN)}", cp2=0xb635ce11 "",
    count=8182) at pbx.c:1676
        cp4 = 0x811a911 "U\211▒\203▒\b▒D$\0047▒\021\b▒\004$▒▒\027\b▒\225▒▒▒▒▒U\211▒S\203▒$▒D$\004(\b"
        tmp = 0xa319250 "VARIABEL=${RT_EXTEN_SETTING(4773103106|DN)}"
        whereweare = 0xa31927b ""
        length = 135775880
        offset = 0
        offset2 = 2147483647
        isfunction = 1
        workspace = 0xb6358c10 ""
        ltmp = 0x0
        var = 0xb6359c20 "RT_EXTEN_SETTING"
        nextvar = 0xa319259 "${RT_EXTEN_SETTING(4773103106|DN)}"
        nextexp = 0x0
        nextthing = 0xa319259 "${RT_EXTEN_SETTING(4773103106|DN)}"
        vars = 0xb6359c20 "RT_EXTEN_SETTING"
        vare = 0xa31927b ""
        pos = 9
        brackets = 0
        needsub = 0
        len = 31
        __PRETTY_FUNCTION__ = "pbx_substitute_variables_helper_full"
#4  0x080d4bc5 in pbx_substitute_variables_helper (c=0xb7a120e0, cp1=0xa319250 "VARIABEL=${RT_EXTEN_SETTING(4773103106|DN)}", cp2=0xb635ce08 "VARIABEL=", count=8191)
    at pbx.c:1770
No locals.
#5  0x080d4ccc in pbx_substitute_variables (passdata=0xb635ce08 "VARIABEL=", datalen=8192, c=0xb7a120e0, e=0xa319280) at pbx.c:1788
No locals.
#6  0x080d4ec2 in pbx_extension_helper (c=0xb7a120e0, con=0x0, context=0xb7a12320 "bugfinder", exten=0xb7a12370 "s", priority=2, label=0x0, callerid=0xb7a0be38 "",
    action=E_SPAWN) at pbx.c:1841
        e = (struct ast_exten *) 0xa319280
        app = (struct ast_app *) 0xa1731b8
        res = 170253460
        q = {incstack = {0x0 <repeats 128 times>}, stacklen = 0, status = 5, swo = 0x0, data = 0x0, foundcontext = 0xb7a12320 "bugfinder"}
        passdata = "VARIABEL=", '\0' <repeats 8182 times>
        matching_action = 0
        __PRETTY_FUNCTION__ = "pbx_extension_helper"
#7  0x080d6400 in ast_spawn_extension (c=0xb7a120e0, context=0xb7a12320 "bugfinder", exten=0xb7a12370 "s", priority=2, callerid=0xb7a0be38 "") at pbx.c:2332
No locals.
#8  0x080d6846 in __ast_pbx_run (c=0xb7a120e0) at pbx.c:2421
        dst_exten = "\030▒5▒▒▒\b\bq#▒▒\221▒%\nO\000\000\000\224▒%\n▒▒m\000▒▒▒▒;\000\000\000 \000\000\000\005\000\000\000▒ ▒▒\001\000\000\000▒\234\021\b\000\000\000\000\000\000\000\000A▒g\000U▒q\000\220▒5▒▒\223q\000(▒5▒▒\234\021\b\234▒q\000\021▒\021\b8▒5▒\001\000\000\000\234▒q\000\220▒5▒U▒\025\b▒▒\025\b(▒5▒\220▒q\000X▒5▒\023▒\021\b\234▒q\000(\b\000\000U▒\025\b\001\000\000\000H▒5▒\220▒5▒U▒\025\b▒▒\025\bX▒5▒\220▒q\000▒▒5▒K\031\r\b▒▒\027\bT▒\025\b\031\n\000\000▒\002\026\b"...
        pos = 0
        digit = 0
        found = 1
        res = 0
        autoloopflag = 0
        error = 0
        __PRETTY_FUNCTION__ = "__ast_pbx_run"
#9  0x080d77fe in ast_pbx_run (c=0xb7a120e0) at pbx.c:2678
        res = AST_PBX_SUCCESS
#10 0x080dd62c in ast_pbx_outgoing_exten (type=0xa25d690 "Console", format=72, data=0xa25d790, timeout=30000, context=0xa25db90 "bugfinder", exten=0xa25da90 "s", priority=1,
    reason=0xb635f32c, sync=2, cid_num=0xa25dc94 "", cid_name=0xa25dd94 "", vars=0x0, account=0xa25de94 "", channel=0x0) at pbx.c:5033
        chan = (struct ast_channel *) 0xb7a120e0
        as = (struct async_stat *) 0x8147d75
        res = 0
        cdr_res = -1
        oh = {context = 0xa25db90 "bugfinder", exten = 0xa25da90 "s", priority = 1, cid_num = 0xa25dc94 "", cid_name = 0xa25dd94 "", account = 0xa25de94 "", vars = 0x0,
  parent_channel = 0x0}
        attr = {__size = "\220▒5▒▒\223q\000\210▒5▒!l`\000\234▒q\000\021▒\021\b\230▒5▒\001\000\000\000\234▒q", __align = -1237976176}
        __PRETTY_FUNCTION__ = "ast_pbx_outgoing_exten"
        __FUNCTION__ = "ast_pbx_outgoing_exten"
#11 0x005793af in attempt_thread (data=0xa25d578) at pbx_spool.c:353
        o = (struct outgoing *) 0xa25d578
        res = 7495668
        reason = 4
        __PRETTY_FUNCTION__ = "attempt_thread"
#12 0x0811b4c5 in dummy_start (data=0xa2c3940) at utils.c:856
        __cancel_buf = {__cancel_jmp_buf = {{__cancel_jmp_buf = {7495668, 0, -1237976176, -1237978168, -1660139162, 589826549}, __mask_was_saved = 0}}, __pad = {0xb635f480,
    0x0, 0xa25d578, 0xa25cd48}}
        __cancel_routine = (void (*)(void *)) 0x806ac83 <ast_unregister_thread>
        __cancel_arg = (void *) 0xb635fb90
        not_first_call = 0
        ret = (void *) 0x716b8c
        a = {start_routine = 0x5790eb <attempt_thread>, data = 0xa25d578, name = 0xa2515a8 "attempt_thread       started at [  381] pbx_spool.c launch_service()"}
        lock_info = (struct thr_lock_info *) 0xa2723a8
        mutex_attr = {__size = "\001\000\000", __align = 1}
#13 0x0071746b in start_thread () from /lib/libpthread.so.0
No symbol table info available.
#14 0x0066edbe in clone () from /lib/libc.so.6
No symbol table info available.