#0  jack_port_get_buffer (port=0x0, nframes=1024) at port.c:581
        node = <optimized out>
        next = <optimized out>
#1  0xf75e4b57 in fluid_jack_driver_process (nframes=1024, arg=0x5706e400) at ./src/drivers/fluid_jack.c:522
        client = 0x5706e400
        audio_driver = 0x5706e3c8
        midi_driver = <optimized out>
        left = <optimized out>
        right = <optimized out>
        i = <optimized out>
        k = <optimized out>
        midi_event = {time = 1460069584, size = 4146967222, buffer = 0xf72e5000 "\310~\001"}
        evt = <optimized out>
        midi_buffer = <optimized out>
        event_count = <optimized out>
        event_index = <optimized out>
        u = <optimized out>
#2  0xf72d4f60 in jack_process_thread_work (arg=0x5706e4d0) at client.c:2214
        status = <optimized out>
        client = 0x5706e4d0
        control = 0xf7702000
#3  0xf72b62d5 in start_thread (arg=0xf6809b40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xf6809b40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-148070400, 0, 4001536, -159345816, -1737341290, -812511083}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#4  0xf750559e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.