(gdb) bt full
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7d5e9a1 in raise () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0xb7d602b9 in abort () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3  0xb7d9287a in __fsetlocking () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#4  0xb7d999ac in free () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#5  0xb7d9b411 in malloc () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#6  0xb7114a8c in mix_multiple_speakers (frames_in=0x814e290, speakers=2,
    listeners=0) at frame.c:243
        __PRETTY_FUNCTION__ = "mix_multiple_speakers"
        cf_spoken = (conf_frame *) 0x43
        cf_sendFrames = (conf_frame *) 0x817ae38
        cp_listenerData = 0x8169468 "\200▒"
        cf_send = (conf_frame *) 0x2
#7  0xb7114d3b in mix_frames (frames_in=0x6, speaker_count=2,
    listener_count=7595) at frame.c:33
        frames_out = <value optimized out>
#8  0xb710fd0e in conference_exec (conf=0x8166a68) at conference.c:404
---Type <return> to continue, or q <return> to quit---
        member = (struct ast_conf_member *) 0x814e290
        temp_member = (struct ast_conf_member *) 0x814e290
        membertest = <value optimized out>
        cfr = (struct conf_frame *) 0x814e290
        spoken_frames = (struct conf_frame *) 0x814e290
        send_frames = <value optimized out>
        speaker_count = 2
        listener_count = 0
        __PRETTY_FUNCTION__ = "conference_exec"
        base = {tv_sec = 1165333831, tv_usec = 873355}
        curr = {tv_sec = 1165333831, tv_usec = 874908}
        notify = {tv_sec = 1165333831, tv_usec = 773358}
        time_diff = 21
        time_sleep = <value optimized out>
        since_last_slept = <value optimized out>
        tf_count = 30
        tf_diff = <value optimized out>
        tf_frequency = 0
        tf_base = {tv_sec = 1165333831, tv_usec = 275127}
        tf_curr = {tv_sec = 1165333831, tv_usec = 275127}
#9  0xb7f1e341 in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
No symbol table info available.
#10 0xb7dff4ee in clone () from /lib/tls/i686/cmov/libc.so.6
---Type <return> to continue, or q <return> to quit---
No symbol table info available.