.
Thread 1 (Thread 0x7fb9e82587c0 (LWP 24000)):
#0  g_logv (log_domain=0x0, log_level=<optimized out>, format=0x40ab48 "AT-SPI: Cannot open default display", args1=0x7fff81d73a08) at /build/buildd/glib2.0-2.29.92/./glib/gmessages.c:577
        depth = 0
        domain = 0x0
        data = 0x0
        log_func = 0x7fb9e75f7910 <g_log_default_handler>
        domain_fatal_mask = <optimized out>
        masquerade_fatal = <optimized out>
        test_level = <optimized out>
        was_fatal = 0
        was_recursion = 0
        i = <optimized out>
#1  0x00007fb9e75f87f2 in g_log (log_domain=<optimized out>, log_level=<optimized out>, format=<optimized out>) at /build/buildd/glib2.0-2.29.92/./glib/gmessages.c:591
        args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff81d73ae0, reg_save_area = 0x7fff81d73a20}}
#2  0x0000000000404521 in spi_set_display (display_name=<optimized out>) at display.c:46
No locals.
#3  spi_set_display (display_name=<optimized out>) at display.c:37
No locals.
#4  0x000000000040454f in spi_get_display () at display.c:55
No locals.
#5  0x00000000004072f6 in spi_device_event_controller_init (device_event_controller=0xca91e0) at deviceeventcontroller.c:2733
        private = <optimized out>
#6  0x00007fb9e78d4833 in g_type_create_instance (type=<optimized out>) at /build/buildd/glib2.0-2.29.92/./gobject/gtype.c:1885
        node = 0xcbd380
        instance = <optimized out>
        class = <optimized out>
        i = <optimized out>
        total_size = <optimized out>
#7  0x00007fb9e78b3d2c in g_object_constructor (type=<optimized out>, n_construct_properties=0, construct_params=0x0) at /build/buildd/glib2.0-2.29.92/./gobject/gobject.c:1629
        object = <optimized out>
#8  0x00007fb9e78b6cc2 in g_object_newv (object_type=13357952, n_parameters=0, parameters=0x0) at /build/buildd/glib2.0-2.29.92/./gobject/gobject.c:1412
        cparams = 0x0
        oparams = 0x0
        nqueue = 0x0
        object = <optimized out>
        class = 0xcbd450
        unref_class = 0xcbd450
        slist = 0x0
        n_total_cparams = <optimized out>
        n_cparams = 0
        n_oparams = 0
        n_cvalues = <optimized out>
        cvalues = <optimized out>
        clist = <optimized out>
        newly_constructed = <optimized out>
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_object_newv"
#9  0x00007fb9e78b783c in g_object_new (object_type=13357952, first_property_name=0x0) at /build/buildd/glib2.0-2.29.92/./gobject/gobject.c:1322
        object = <optimized out>
        var_args = {{gp_offset = 13357952, fp_offset = 0, overflow_arg_area = 0xcbd380, reg_save_area = 0x410662}}
        __PRETTY_FUNCTION__ = "g_object_new"
#10 0x000000000040a73a in spi_registry_dec_new (reg=0xcbc800, bus=0xcb95d0) at deviceeventcontroller.c:2976
        dec = <optimized out>
#11 0x0000000000403da9 in main (argc=1, argv=0x7fff81d740b8) at registry-main.c:236
        registry = <optimized out>
        bus = 0xcb95d0
        opt = <optimized out>
        err = 0x0
        error = {name = 0x0, message = 0x0, dummy1 = 1, dummy2 = 0, dummy3 = 0, dummy4 = 0, dummy5 = 0, padding1 = 0x403fa8}
        ret = <optimized out>