Mine

(gdb) bt full
#0  0x283130b3 in select () from /lib/libc.so.6
No symbol table info available.
#1  0x282b2639 in select () from /usr/lib/libpthread.so.2
No symbol table info available.
#2  0x283dda3e in ast_select (nfds=0, rfds=0xbf7b8e40, wfds=0x0, efds=0xbf7b8dc0, tvp=0x0) at channel.h:1168
No locals.
#3  0x283dd915 in do_parking_thread (ignore=0x0) at res_features.c:1657
        ms = -1
        tms = 0
        max = -1
        pu = (struct parkeduser *) 0x0
        pl = (struct parkeduser *) 0x0
        pt = (struct parkeduser *) 0x0
        tv = {tv_sec = 4294967, tv_usec = 295000}
        f = (struct ast_frame *) 0x0
        exten = '\0' <repeats 79 times>
        peername = 0x0
        cp = 0x0
        returnexten = '\0' <repeats 79 times>
        con = (struct ast_context *) 0x0
        x = 0
        rfds = {__fds_bits = {0 <repeats 32 times>}}
        efds = {__fds_bits = {0 <repeats 32 times>}}
        nrfds = {__fds_bits = {0 <repeats 32 times>}}
        nefds = {__fds_bits = {0 <repeats 32 times>}}
        __PRETTY_FUNCTION__ = "do_parking_thread"
#4  0x282b4ab1 in pthread_create () from /usr/lib/libpthread.so.2
No symbol table info available.
#5  0x2836e45f in _ctx_start () from /lib/libc.so.6
No symbol table info available.