#0  0x00007fe9f30b1f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 9543
        selftid = 9543
#1  0x00007fe9f30b5388 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x416000 <flush_checkbox>, sa_sigaction = 0x416000 <flush_checkbox>}, sa_mask = {__val = {140734916148784, 0, 140642825463127, 5, 0, 0, 140642781502760, 140734916148992, 0, 140734916148880, 140642825491733, 200, 0, 140734916151680, 1, 20}}, sa_flags = 1, sa_restorer = 0x0}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00000000004160b1 in flush_changes (visual=0x0, command=0x0, enabled_p=0, list_elt=<optimized out>, s=<optimized out>) at ./demo-Gtk.c:1278
        p = <optimized out>
        changed = 0
        hack = <optimized out>
        hack_number = <optimized out>
#3  flush_checkbox (model=<optimized out>, path=<optimized out>, iter=<optimized out>, data=0x7fff66af3f00) at ./demo-Gtk.c:1459
        closure = 0x7fff66af3f00
        checked = 0
#4  0x00007fe9f5409218 in gtk_tree_model_foreach_helper (model=model@entry=0x192d2a0, iter=iter@entry=0x7fff66af3e90, path=path@entry=0x1a16080, func=func@entry=0x416000 <flush_checkbox>, user_data=user_data@entry=0x7fff66af3f00) at /build/buildd/gtk+2.0-2.24.23/gtk/gtktreemodel.c:1607
        child = {stamp = 0, user_data = 0x0, user_data2 = 0x0, user_data3 = 0x0}
#5  0x00007fe9f540a49e in IA__gtk_tree_model_foreach (model=0x192d2a0, func=func@entry=0x416000 <flush_checkbox>, user_data=user_data@entry=0x7fff66af3f00) at /build/buildd/gtk+2.0-2.24.23/gtk/gtktreemodel.c:1653
        path = 0x1a16080
        iter = {stamp = 471018972, user_data = 0x193acf0, user_data2 = 0x0, user_data3 = 0x0}
        __FUNCTION__ = "IA__gtk_tree_model_foreach"
#6  0x00000000004137a1 in flush_dialog_changes_and_save (s=0x7fff66af4980) at ./demo-Gtk.c:1505
        p = 0x7fff66af4a10
        P2 = {db = 0x178c180, init_file_date = 1395876230, verbose_p = 0, timestamp_p = 1, capture_stderr_p = 1, ignore_uninstalled_p = 0, debug_p = 0, xsync_p = 0, lock_p = 0, fade_p = 1, unfade_p = 1, fade_seconds = 1000, fade_ticks = 20, splash_p = 1, install_cmap_p = 1, screenhacks = 0x1aa9c00, screenhacks_count = 200, mode = ONE_HACK, selected_hack = 80, nice_inferior = 10, inferior_memory_limit = 0, initial_delay = 0, splash_duration = 5000, timeout = 600000, lock_timeout = 0, cycle = 600000, passwd_timeout = 30000, pointer_timeout = 5000, notice_events_timeout = 30000, watchdog_timeout = 57000, pointer_hysteresis = 10, dpms_enabled_p = 0, dpms_quickoff_p = 0, dpms_standby = 7200000, dpms_suspend = 7200000, dpms_off = 14400000, grab_desktop_p = 1, grab_video_p = 0, random_image_p = 1, image_directory = 0x1a89fd0 "/home/bugbear/Pictures/ScreenSave", tmode = TEXT_URL, text_literal = 0x1a79f90 "XScreenSaver", text_file = 0x1a89b70 "", text_program = 0x1918780 "fortune", text_url = 0x19f4ae0 "http://fridge.ubuntu.com/node/feed", use_xidle_extension = 1, use_mit_saver_extension = 0, use_sgi_saver_extension = 0, use_proc_interrupts = 1, use_xinput_extension = 0, getviewport_full_of_lies_p = 0, shell = 0x1a7acf0 "/bin/sh", demo_command = 0x1a49000 "xscreensaver-demo", prefs_command = 0x1a1eda0 "xscreensaver-demo -prefs", help_url = 0x1a1d6b0 "http://www.jwz.org/xscreensaver/man.html", load_url_command = 0x1a50fa0 "x-www-browser '%s'", new_login_command = 0x1906560 "gdmflexiserver -ls"}
        p2 = 0x7fff66af3f20
        list_widget = <optimized out>
        model = <optimized out>
        closure = {s = 0x7fff66af4980, i = 200, changed = 0x7fff66af3efc}
        already_warned_about_missing_image_directory = 0
        changed = 0
        w = <optimized out>
#7  0x0000000000414a9c in wm_toplevel_close_cb (widget=<optimized out>, event=<optimized out>, data=<optimized out>) at ./demo-Gtk.c:794
        s = <optimized out>
#8  0x00007fe9f53357e5 in _gtk_marshal_BOOLEAN__BOXED (closure=0x1937950, return_value=0x7fff66af4300, n_param_values=<optimized out>, param_values=0x7fff66af43b0, invocation_hint=<optimized out>, marshal_data=0x0) at /build/buildd/gtk+2.0-2.24.23/gtk/gtkmarshalers.c:86
        callback = <optimized out>
        cc = <optimized out>
        data1 = 0x17cc180
        data2 = <optimized out>
        v_return = <optimized out>
        __FUNCTION__ = "_gtk_marshal_BOOLEAN__BOXED"
#9  0x00007fe9f45403b8 in g_closure_invoke (closure=0x1937950, return_value=0x7fff66af4300, n_param_values=2, param_values=0x7fff66af43b0, invocation_hint=0x7fff66af4350) at /build/buildd/glib2.0-2.39.92/./gobject/gclosure.c:768
        marshal = 0x7fe9f5335770 <_gtk_marshal_BOOLEAN__BOXED>
        marshal_data = 0x0
        in_marshal = 0
        real_closure = 0x1937930
        __FUNCTION__ = "g_closure_invoke"
#10 0x00007fe9f4551d3d in signal_emit_unlocked_R (node=node@entry=0x1786820, detail=detail@entry=0, instance=instance@entry=0x17cc180, emission_return=emission_return@entry=0x7fff66af4480, instance_and_params=instance_and_params@entry=0x7fff66af43b0) at /build/buildd/glib2.0-2.39.92/./gobject/gsignal.c:3551
        tmp = <optimized out>
        handler = 0x1936ac0
        accumulator = 0x1787c30
        emission = {next = 0x0, instance = 0x17cc180, ihint = {signal_id = 39, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        handler_list = 0x1936ac0
        return_accu = 0x7fff66af4300
        accu = {g_type = 20, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 39
        max_sequential_handler_number = 1358
        return_value_altered = 0
#11 0x00007fe9f45596f9 in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=var_args@entry=0x7fff66af4548) at /build/buildd/glib2.0-2.39.92/./gobject/gsignal.c:3317
        return_value = {g_type = 20, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        error = 0x0
        rtype = 20
        static_scope = 0
        instance_and_params = 0x7fff66af43b0
        signal_return_type = <optimized out>
        param_values = 0x7fff66af43c8
        i = <optimized out>
        n_params = <optimized out>
        __FUNCTION__ = "g_signal_emit_valist"
#12 0x00007fe9f4559ce2 in g_signal_emit (instance=instance@entry=0x17cc180, signal_id=<optimized out>, detail=detail@entry=0) at /build/buildd/glib2.0-2.39.92/./gobject/gsignal.c:3363
        var_args = {{gp_offset = 32, fp_offset = 48, overflow_arg_area = 0x7fff66af4620, reg_save_area = 0x7fff66af4560}}
#13 0x00007fe9f5445674 in gtk_widget_event_internal (widget=widget@entry=0x17cc180, event=event@entry=0x19c6ad0) at /build/buildd/gtk+2.0-2.24.23/gtk/gtkwidget.c:5010
        signal_num = <optimized out>
        return_val = 0
#14 0x00007fe9f5445949 in IA__gtk_widget_event (widget=widget@entry=0x17cc180, event=event@entry=0x19c6ad0) at /build/buildd/gtk+2.0-2.24.23/gtk/gtkwidget.c:4807
        __FUNCTION__ = "IA__gtk_widget_event"
#15 0x00007fe9f53345bb in IA__gtk_main_do_event (event=0x19c6ad0) at /build/buildd/gtk+2.0-2.24.23/gtk/gtkmain.c:1601
        event_widget = 0x17cc180
        grab_widget = 0x17cc180
        window_group = 0x1966500
        rewritten_event = <optimized out>
        tmp_list = <optimized out>
        __FUNCTION__ = "IA__gtk_main_do_event"
#16 0x00007fe9f4c4922c in gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+2.0-2.24.23/gdk/x11/gdkevents-x11.c:2403
        display = <optimized out>
        event = 0x19c6ad0
#17 0x00007fe9f4270e04 in g_main_dispatch (context=0x1780ff0) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3064
        dispatch = 0x7fe9f4c491e0 <gdk_event_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x0
        callback = 0x0
        cb_funcs = <optimized out>
        cb_data = 0x0
        need_destroy = <optimized out>
        source = 0x1780f00
        current = 0x19b4b40
        i = 0
#18 g_main_context_dispatch (context=context@entry=0x1780ff0) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3663
No locals.
#19 0x00007fe9f4271048 in g_main_context_iterate (context=0x1780ff0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3734
        max_priority = 2147483647
        timeout = 57678
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 2
        fds = 0x18e1160
#20 0x00007fe9f427130a in g_main_loop_run (loop=0x1973ee0) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3928
        __FUNCTION__ = "g_main_loop_run"
#21 0x00007fe9f5333417 in IA__gtk_main () at /build/buildd/gtk+2.0-2.24.23/gtk/gtkmain.c:1271
        tmp_list = 0x0
        functions = 0x0
        init = <optimized out>
        loop = 0x1973ee0
#22 0x00000000004093c6 in main (argc=1, argv=0x7fff66af51a8) at ./demo-Gtk.c:5312
        app = <optimized out>
        S = {short_version = 0x174e7f0 "5.15", toplevel_widget = 0x17cc180, base_widget = 0x17cc180, popup_widget = 0x1916030, cdata = 0x17a2a40, glade_ui = 0x7fe9e8005b10, debug_p = 0, initializing_p = 0, saving_p = 1, desired_preview_cmd = 0x1948060 "ripples -root -delay 28244 -duration 24", running_preview_cmd = 0x1901780 "ripples -root -delay 28244 -duration 24", running_preview_pid = 9557, running_preview_error_p = 0, preview_suppressed_p = 0, subproc_timer_id = 0, subproc_check_timer_id = 0, subproc_check_countdown = 0, list_elt_to_hack_number = 0x17c27d0, hack_number_to_list_elt = 0x17a9300, hacks_available_p = 0x17a9630, total_available = 199, list_count = 200, _selected_list_element = 148, nscreens = 1, prefs = {db = 0x178c180, init_file_date = 1395876230, verbose_p = 0, timestamp_p = 1, capture_stderr_p = 1, ignore_uninstalled_p = 0, debug_p = 0, xsync_p = 0, lock_p = 0, fade_p = 1, unfade_p = 1, fade_seconds = 1000, fade_ticks = 20, splash_p = 1, install_cmap_p = 1, screenhacks = 0x1aa9c00, screenhacks_count = 200, mode = ONE_HACK, selected_hack = 80, nice_inferior = 10, inferior_memory_limit = 0, initial_delay = 0, splash_duration = 5000, timeout = 600000, lock_timeout = 0, cycle = 600000, passwd_timeout = 30000, pointer_timeout = 5000, notice_events_timeout = 30000, watchdog_timeout = 57000, pointer_hysteresis = 10, dpms_enabled_p = 0, dpms_quickoff_p = 0, dpms_standby = 7200000, dpms_suspend = 7200000, dpms_off = 14400000, grab_desktop_p = 1, grab_video_p = 0, random_image_p = 1, image_directory = 0x1a89fd0 "/home/bugbear/Pictures/ScreenSave", tmode = TEXT_URL, text_literal = 0x1a79f90 "XScreenSaver", text_file = 0x1a89b70 "", text_program = 0x1918780 "fortune", text_url = 0x19f4ae0 "http://fridge.ubuntu.com/node/feed", use_xidle_extension = 1, use_mit_saver_extension = 0, use_sgi_saver_extension = 0, use_proc_interrupts = 1, use_xinput_extension = 0, getviewport_full_of_lies_p = 0, shell = 0x1a7acf0 "/bin/sh", demo_command = 0x1a49000 "xscreensaver-demo", prefs_command = 0x1a1eda0 "xscreensaver-demo -prefs", help_url = 0x1a1d6b0 "http://www.jwz.org/xscreensaver/man.html", load_url_command = 0x1a50fa0 "x-www-browser '%s'", new_login_command = 0x1906560 "gdmflexiserver -ls"}}
        s = 0x7fff66af4980
        p = 0x7fff66af4a10
        prefs_p = <optimized out>
        settings_p = <optimized out>
        i = <optimized out>
        dpy = <optimized out>
        toplevel_shell = <optimized out>
        real_progname = <optimized out>
        window_title = 0x0
        geom = <optimized out>
        crapplet_p = <optimized out>
        str = <optimized out>