#0  gst_thumbnailer_play_start (cancellable=0x7f04a0006b30, play=0x0) at gst-thumbnailer.c:461
        bus = 0x0
        terminate = 0
        message = 0x0
        async_received = 0
#1  gst_thumbnailer_create (thumbnailer=0x7f04ae733de0, cancellable=0x7f04a0006b30, info=0x7f04ae7e3a80) at gst-thumbnailer.c:581
        play = 0x0
        pixbuf = 0x0
        duration = <optimized out>
        data = {colorspace = (unknown: 2927508688), data = 0x0, has_alpha = -1389189009, bits_per_sample = 32516, width = -1392115679, height = 0, rowstride = -1368374784}
        error = 0x0
        thumbnail = 0x7f0498003680
        width = <optimized out>
        height = <optimized out>
        flavor = <optimized out>
        scaled = 0x7f04a0006b30
#2  0x00007f04ae15b59c in tumbler_lifo_scheduler_thread (data=0x7f04ae7e3cd0, user_data=0x7f04a00050c0) at tumbler-lifo-scheduler.c:495
        request = 0x7f04ae7e3cd0
        scheduler = 0x7f04a00050c0
        uris = <optimized out>
        uri_needs_update = <optimized out>
        error = 0x0
        cached_uris = <optimized out>
        missing_uris = <optimized out>
        lp = 0x7f04ae780c80
        n = <optimized out>
        __PRETTY_FUNCTION__ = "tumbler_lifo_scheduler_thread"
#3  0x00007f04ad069a12 in g_thread_pool_new (func=<optimized out>, user_data=<optimized out>, max_threads=<optimized out>, exclusive=<optimized out>, error=<optimized out>) at /build/buildd/glib2.0-2.36.0/./glib/gthreadpool.c:513
        retval = <optimized out>
        g__init_lock = {p = 0x7f04ae7293e0, i = {2926744544, 32516}}
        __PRETTY_FUNCTION__ = "g_thread_pool_new"
#4  0x00007f04acde6f8e in start_thread (arg=0x7f04a5614700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7f04a5614700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139657931212544, -1640887098479870496, 0, 139658077180000, 140734157270288, 4096, 1671731713232207328, 1671746254335114720}, 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"
#5  0x00007f04acb10e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.