(gdb) bt
#0  0x008170ec in memcpy () from /lib/tls/libc.so.6
#1  0x080f75c4 in ast_slinfactory_read ()
#2  0x080754a5 in audiohook_read_frame_both ()
#3  0x08075991 in ast_audiohook_read_frame ()
#4  0x00c087e1 in mixmonitor_thread (obj=0x9d33718) at app_mixmonitor.c:166
#5  0x08106ad0 in dummy_start ()
#6  0x0095c3cc in start_thread () from /lib/tls/libpthread.so.0
#7  0x008751ae in clone () from /lib/tls/libc.so.6
(gdb) bt full
#0  0x008170ec in memcpy () from /lib/tls/libc.so.6
No symbol table info available.
#1  0x080f75c4 in ast_slinfactory_read ()
No symbol table info available.
#2  0x080754a5 in audiohook_read_frame_both ()
No symbol table info available.
#3  0x08075991 in ast_audiohook_read_frame ()
No symbol table info available.
#4  0x00c087e1 in mixmonitor_thread (obj=0x9d33718) at app_mixmonitor.c:166
        fr = (struct ast_frame *) 0x0
        mixmonitor = (struct mixmonitor *) 0x9d33718
        fs = (struct ast_filestream *) 0x9de1570
        oflags = 577
        ext = 0x9d34ce2 "WAV"
        errflag = 0
        __PRETTY_FUNCTION__ = "mixmonitor_thread"
#5  0x08106ad0 in dummy_start ()
No symbol table info available.
#6  0x0095c3cc in start_thread () from /lib/tls/libpthread.so.0
No symbol table info available.
#7  0x008751ae in clone () from /lib/tls/libc.so.6
No symbol table info available.