(gdb) bt full
#0  0x00007ffff69cca20 in gdk_x_error (xdisplay=0x5555557f38f0, error=0x7fffffffc320) at ../../../../../gdk/x11/gdkmain-x11.c:272
#1  0x00007ffff4b6a8fa in _XError () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#2  0x00007ffff4b6782b in  () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#3  0x00007ffff4b689d4 in _XReply () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#4  0x00007ffff4b4e435 in XGetWindowProperty () at /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007fffd202a23f in  () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#6  0x00007fffd201fc5f in  () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#7  0x00007fffd2023cd7 in  () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#8  0x00007fffd2023d62 in wnck_window_get_icon () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#9  0x00007fffd200e1f3 in  () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#10 0x00007fffd20109b8 in  () at /usr/lib/x86_64-linux-gnu/libwnck-3.so.0
#11 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=widget@entry=0x555555bbc190, cr=cr@entry=0x555555b42c00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = 1
        widget = 0x555555bbc190
#12 0x00007ffff6dbf3ca in gtk_container_propagate_draw (container=container@entry=0x555555bba280, child=0x555555bbc190, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3841
        allocation = <optimised out>
        w = 0x555555b584d0
        x = 0
        y = 0
        __func__ = "gtk_container_propagate_draw"
#13 0x00007ffff6dbf4b2 in gtk_container_draw (widget=0x555555bba280, cr=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3661
        container = 0x555555bba280
        child_infos = 0x7fffe0034010
        i = 0
        child_info = <optimised out>
        data = {container = 0x555555bba280, child_infos = 0x7fffe0034010, cr = 0x555555b42c00}
#14 0x00007ffff6e0b90c in gtk_event_box_draw (widget=0x555555bba280, cr=0x555555b42c00) at ../../../../gtk/gtkeventbox.c:619
#15 0x00005555555ad8ee in gp_applet_draw (widget=0x555555bba280, cr=0x555555b42c00) at gp-applet.c:332
        ret = <optimised out>
#16 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=widget@entry=0x555555bba280, cr=cr@entry=0x555555b42c00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = 1
        widget = 0x555555bba280
#17 0x00007ffff6dbf3ca in gtk_container_propagate_draw (container=container@entry=0x555555b95820, child=0x555555bba280, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3841
---Type <return> to continue, or q <return> to quit---
        allocation = <optimised out>
        w = 0x555555b58340
        x = 0
        y = 0
        __func__ = "gtk_container_propagate_draw"
#18 0x00007ffff6dbf4b2 in gtk_container_draw (widget=0x555555b95820, cr=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3661
        container = 0x555555b95820
        child_infos = 0x7fffe0034430
        i = 0
        child_info = <optimised out>
        data = {container = 0x555555b95820, child_infos = 0x7fffe0034430, cr = 0x555555b42c00}
#19 0x00007ffff6e0b90c in gtk_event_box_draw (widget=0x555555b95820, cr=0x555555b42c00) at ../../../../gtk/gtkeventbox.c:619
#20 0x000055555558ac2f in panel_applet_frame_draw (widget=0x555555b95820, cr=0x555555b42c00) at panel-applet-frame.c:104
        frame = 0x555555b95820
        context = <optimised out>
        state = <optimised out>
        bg_pattern = 0x555555b42c00
#21 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=widget@entry=0x555555b95820, cr=cr@entry=0x555555b42c00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = 1
        widget = 0x555555b95820
#22 0x00007ffff6dbf3ca in gtk_container_propagate_draw (container=container@entry=0x555555ace2e0, child=0x555555b95820, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3841
        allocation = <optimised out>
        w = 0x555555817980
        x = 1604
        y = 0
        __func__ = "gtk_container_propagate_draw"
#23 0x00007ffff6e2c0e1 in gtk_fixed_draw (widget=0x555555ace2e0, cr=0x555555b42c00) at ../../../../gtk/gtkfixed.c:597
        fixed = 0x555555ace2e0
        priv = <optimised out>
        child = <optimised out>
        list = 0x555555971140
#24 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=widget@entry=0x555555ace2e0, cr=cr@entry=0x555555b42c00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = 1
        widget = 0x555555ace2e0
---Type <return> to continue, or q <return> to quit---
#25 0x00007ffff6dbf3ca in gtk_container_propagate_draw (container=container@entry=0x555555acc870, child=0x555555ace2e0, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3841
        allocation = <optimised out>
        w = 0x5555558177f0
        x = 0
        y = 0
        __func__ = "gtk_container_propagate_draw"
#26 0x00007ffff6dbf4b2 in gtk_container_draw (widget=0x555555acc870, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3661
        container = 0x555555acc870
        child_infos = 0x7fffe003a2d0
        i = 0
        child_info = <optimised out>
        data = {container = 0x555555acc870, child_infos = 0x7fffe003a2d0, cr = 0x555555b42c00}
#27 0x00007ffff6e41fc4 in gtk_grid_render (gadget=<optimised out>, cr=0x555555b42c00, x=<optimised out>, y=<optimised out>, width=<optimised out>, height=<optimised out>, data=0x0) at ../../../../gtk/gtkgrid.c:1713
#28 0x00007ffff6dc440d in gtk_css_custom_gadget_draw (gadget=<optimised out>, cr=<optimised out>, x=<optimised out>, y=<optimised out>, width=<optimised out>, height=<optimised out>) at ../../../../gtk/gtkcsscustomgadget.c:159
#29 0x00007ffff6dc9063 in gtk_css_gadget_draw (gadget=0x5555559db380, cr=0x555555b42c00) at ../../../../gtk/gtkcssgadget.c:877
        margin = {left = 0, right = 0, top = 0, bottom = 0}
        border = {left = 0, right = 0, top = 0, bottom = 0}
        padding = {left = 0, right = 0, top = 0, bottom = 0}
        draw_focus = 0
        x = 0
        y = 0
        width = 1680
        height = 24
        contents_x = 0
        contents_y = 0
        contents_width = 1680
        contents_height = 24
        margin_box = {x = 0, y = 0, width = 1680, height = 24}
        __func__ = "gtk_css_gadget_draw"
#30 0x00007ffff6e43031 in gtk_grid_draw (widget=<optimised out>, cr=<optimised out>) at ../../../../gtk/gtkgrid.c:1722
#31 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=widget@entry=0x555555acc870, cr=cr@entry=0x555555b42c00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = 1
        widget = 0x555555acc870
#32 0x00007ffff6dbf3ca in gtk_container_propagate_draw (container=container@entry=0x555555ac4810, child=0x555555acc870, cr=cr@entry=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3841
        allocation = <optimised out>
        w = 0x5555558177f0
---Type <return> to continue, or q <return> to quit---
        x = 0
        y = 0
        __func__ = "gtk_container_propagate_draw"
#33 0x00007ffff6dbf4b2 in gtk_container_draw (widget=0x555555ac4810, cr=0x555555b42c00) at ../../../../gtk/gtkcontainer.c:3661
        container = 0x555555ac4810
        child_infos = 0x7fffe0036950
        i = 0
        child_info = <optimised out>
        data = {container = 0x555555ac4810, child_infos = 0x7fffe0036950, cr = 0x555555b42c00}
#34 0x00007ffff6fe66ef in gtk_window_draw (widget=0x555555ac4810, cr=0x555555b42c00) at ../../../../gtk/gtkwindow.c:10545
        priv = <optimised out>
        context = 0x555555a16f00
        ret = 0
        allocation = <optimised out>
        window_border = {left = 0, right = 0, top = 0, bottom = 0}
        title_height = <optimised out>
#35 0x0000555555595fa3 in panel_toplevel_draw (widget=0x555555ac4810, cr=0x555555b42c00) at panel-toplevel.c:2645
        toplevel = 0x555555ac4810
        retval = 0
#36 0x00007ffff6fd88db in gtk_widget_draw_internal (widget=0x555555ac4810, cr=0x555555b42c00, clip_to_size=<optimised out>)
    at ../../../../gtk/gtkwidget.c:7032
        event_window = <optimised out>
        result = 1072693248
        push_group = <optimised out>
        cr = 0x555555b42c00
        clip_to_size = <optimised out>
        widget = 0x555555ac4810
#37 0x00007ffff6fe1998 in gtk_widget_render (widget=widget@entry=0x555555ac4810, window=0x5555558177f0, region=<optimised out>)
    at ../../../../gtk/gtkwidget.c:17542
        context = 0x7fffe0036980
        do_clip = 1
        cr = 0x555555b42c00
        x = 0
        y = 0
        is_double_buffered = <optimised out>
#38 0x00007ffff6e85859 in gtk_main_do_event (event=<optimised out>) at ../../../../gtk/gtkmain.c:1838
        window_group = 0x555555962c70
        device = 0x0
        tmp_list = <optimised out>
        event_widget = 0x555555ac4810
        event = 0x7fffffffd240
#39 0x00007ffff6996765 in _gdk_event_emit (event=event@entry=0x7fffffffd240) at ../../../../gdk/gdkevents.c:73
#40 0x00007ffff69a67f5 in _gdk_window_process_updates_recurse_helper (window=0x5555558177f0, expose_region=<optimised out>)
    at ../../../../gdk/gdkwindow.c:3852
        event = 
---Type <return> to continue, or q <return> to quit---
            {type = GDK_EXPOSE, any = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000'}, expose = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', area = {x = 1604, y = 0, width = 76, height = 24}, region = 0x5555560cbda0, count = 0}, visibility = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', state = (unknown: 1604)}, motion = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, axes = 0x5555560cbda0, state = 0, is_hint = 21845, device = 0x7ffff69c98f0, x_root = 4.6355706815018502e-310, y_root = 9.8813129168249309e-324}, button = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, axes = 0x5555560cbda0, state = 0, button = 21845, device = 0x7ffff69c98f0, x_root = 4.6355706815018502e-310, y_root = 9.8813129168249309e-324}, touch = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, axes = 0x5555560cbda0, state = 0, sequence = 0x7ffff69c98f0 <gdk_x11_window_invalidate_for_new_frame+48>, emulating_pointer = 1434549008, device = 0x2, x_root = 4.6355707840769928e-310, y_root = 4.635571158050695e-310}, scroll = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, state = 1443675552, direction = 21845, device = 0x555500000000, x_root = 6.9533480258370559e-310, y_root = 4.6355706815018502e-310, delta_x = 9.8813129168249309e-324, delta_y = 4.6355707840769928e-310, is_stop = 0}, key = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, state = 0, keyval = 76, length = 24, string = 0x5555560cbda0 "\002", hardware_keycode = 0, group = 0 '\000', is_modifier = 0}, crossing = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', subwindow = 0x4c00000000, time = 24, x = 4.6355711324130358e-310, y = 4.6354998053636374e-310, x_root = 6.9533480258370559e-310, y_root = 4.6355706815018502e-310, mode = GDK_CROSSING_UNGRAB, detail = GDK_NOTIFY_ANCESTOR, focus = 1436625152, state = 21845}, focus_change = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', in = 21889}, configure = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', x = 1604, y = 0, width = 76, height = 24}, property = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', atom = 0x4c00000000, time = 24, state = 21845}, selection = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', selection = 0x4c00000000, target = 0x555500000018, property = 0x5555560cbda0, time = 0, requestor = 0x7ffff69c98f0}, owner_change = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', owner = 0x4c00000000, reason = (unknown: 24), selection = 0x5555560cbda0, time = 0, selection_time = 21845}, proximity = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, device = 0x4c00000000}, dnd = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', context = 0x4c00000000, time = 24, x_root = 21845, y_root = 0}, window_state = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', changed_mask = (GDK_WINDOW_STATE_MAXIMIZED | GDK_WINDOW_STATE_BELOW | GDK_WINDOW_STATE_TOP_TILED | GDK_WINDOW_STATE_TOP_RESIZABLE), new_window_state = (unknown: 0)}, setting = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', action = (unknown: 1604), name = 0x4c00000000 <error: Cannot access memory at address 0x4c00000000>}, grab_broken = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', keyboard = 1604, implicit = 0, grab_window = 0x555500000018}, touchpad_swipe = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', phase = 0 '\000', n_fingers = -127 '\201', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, dx = 4.6355711324130358e-310, dy = 4.6354998053636374e-310, x_root = 6.9533480258370559e-310, y_root = 4.6355706815018502e-310, state = 2}, touchpad_pinch = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', phase = 0 '\000', n_fingers = -127 '\201', time = 1604, x = 1.612716801133607e-312, y = 4.6354998053648231e-310, dx = 4.6355711324130358e-310, dy = 4.6354998053636374e-310, angle_delta = 6.9533480258370559e-310, scale = 4.6355706815018502e-310, x_root = 9.8813129168249309e-324, y_root = 4.6355707840769928e-310, state = 1444194464}, pad_button = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, group = 0, button = 76, mode = 24}, pad_axis = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, group = 0, index = 76, mode = 24, value = 4.6355711324130358e-310}, pad_group_mode = {type = GDK_EXPOSE, window = 0x5555558177f0, send_event = 0 '\000', time = 1604, group = 0, mode = 76}}
        child = <optimised out>
        clipped_expose_region = 0x5555560cbda0
        children = <optimised out>
        i = <optimised out>
        n_children = <optimised out>
        l = <optimised out>
        last_link = <optimised out>
#41 0x00007ffff69a79f6 in gdk_window_process_updates_internal (window=0x5555558177f0) at ../../../../gdk/gdkwindow.c:3998
        expose_region = 0x55555620e690
---Type <return> to continue, or q <return> to quit---
        impl_class = 0x555555816390
        toplevel = <optimised out>
        display = <optimised out>
        __func__ = "gdk_window_process_updates_internal"
#42 0x00007ffff69a7bf0 in gdk_window_process_updates_with_mode (window=<optimised out>, recurse_mode=<optimised out>)
    at ../../../../gdk/gdkwindow.c:4192
        impl_window = 0x5555558177f0
        list = 0x555555a12900
        i = <optimised out>
        __func__ = "gdk_window_process_updates_with_mode"
#43 0x00007ffff518910d in g_closure_invoke () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#44 0x00007ffff519c05e in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#45 0x00007ffff51a4715 in g_signal_emit_valist () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#46 0x00007ffff51a512f in g_signal_emit () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#47 0x00007ffff699f36f in _gdk_frame_clock_emit_paint (frame_clock=<optimised out>) at ../../../../gdk/gdkframeclock.c:640
#48 0x00007ffff699fac9 in gdk_frame_clock_paint_idle (data=0x55555583a3b0) at ../../../../gdk/gdkframeclockidle.c:459
        clock = 0x55555583a3b0
        clock_idle = 0x55555583a3b0
        priv = 0x55555583a2d0
        skip_to_resume_events = 0
        timings = 0x5555560e7920
        __func__ = "gdk_frame_clock_paint_idle"
#49 0x00007ffff698b080 in gdk_threads_dispatch (data=0x555555a0ed00) at ../../../../gdk/gdk.c:743
        dispatch = 0x555555a0ed00
        ret = 0
#50 0x00007ffff4eaed03 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#51 0x00007ffff4eae285 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#52 0x00007ffff4eae650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#53 0x00007ffff4eae962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#54 0x00007ffff6e84a25 in gtk_main () at ../../../../gtk/gtkmain.c:1323
        loop = 0x555555afe360
#55 0x0000555555574702 in main (argc=<optimised out>, argv=<optimised out>) at main.c:205
        context = <optimised out>
        error = 0x0
        session = 0x555555a71c60
        toplevels_to_destroy = <optimised out>
        l = <optimised out>
(gdb)