Gnubiff is in panel. Run panel in gdb

Now send myself email.

[Thread 0x7fffd05ae700 (LWP 5601) exited]
[New Thread 0x7fffd05ae700 (LWP 5604)]
[Thread 0x7fffce494700 (LWP 5602) exited]
[New Thread 0x7fffce494700 (LWP 5628)]
[New Thread 0x7fffcd159700 (LWP 5629)]
[Thread 0x7fffce494700 (LWP 5628) exited]
[Thread 0x7fffcd159700 (LWP 5629) exited]
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
gnome-panel: ../../src/xcb_io.c:259: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
[Switching to Thread 0x7fffd05ae700 (LWP 5604)]

Thread 7 "gnome-panel" hit Breakpoint 1, gdk_x_error (
    xdisplay=0x5555557f38f0, error=0x7fffd05ac8d0)
    at ../../../../../gdk/x11/gdkmain-x11.c:272
272	../../../../../gdk/x11/gdkmain-x11.c: No such file or directory.
(gdb) 

(gdb) bt full
#0  0x00007ffff69cca20 in gdk_x_error (xdisplay=0x5555557f38f0, error=0x7fffd05ac8d0) at ../../../../../gdk/x11/gdkmain-x11.c:272
#1  0x00007ffff4b6a8fa in _XError ()
    at /usr/lib/x86_64-linux-gnu/libX11.so.6
#2  0x00007ffff4b4e52c in XGetWindowProperty ()
    at /usr/lib/x86_64-linux-gnu/libX11.so.6
#3  0x00007ffff69d069d in get_current_desktop (screen=0x555555810020)
    at ../../../../../gdk/x11/gdkscreen-x11.c:220
        type = 0
        n_items = 0
        data_return = 0x0
        workspace = 0
        display = 0x5555557f38f0
        win = 1243
        current_desktop = <optimised out>
        format = 0
        bytes_after = 0
        x11_screen = 0x555555810020
        workarea = <optimised out>
        type = 6
        win = <optimised out>
        format = 32
        num = 4
        leftovers = 0
        ret_workarea = 0x55555637ff80 ""
        workareas = <optimised out>
        result = 0
        disp_screen = <optimised out>
        display = <optimised out>
#4  0x00007ffff69d069d in gdk_x11_screen_get_work_area (screen=screen@entry=0x555555810020, area=area@entry=0x7fffd05acb30)
    at ../../../../../gdk/x11/gdkscreen-x11.c:293
        x11_screen = 0x555555810020
        workarea = <optimised out>
        type = 6
        win = <optimised out>
        format = 32
        num = 4
        leftovers = 0
        ret_workarea = 0x55555637ff80 ""
        workareas = <optimised out>
        result = 0
        disp_screen = <optimised out>
        display = <optimised out>
#5  0x00007ffff69cd1ad in gdk_x11_monitor_get_workarea (monitor=0x5555557f0640, dest=0x7fffd05acba0) at ../../../../../gdk/x11/gdkmonitor-x11.c:78
        screen = 0x555555810020
        workarea = {x = 0, y = 0, width = 3360, height = 1050}
---Type <return> to continue, or q <return> to quit---
#6  0x00007ffff6fe35dd in gtk_window_guess_default_size (window=window@entry=0x555555e0d4d0, width=width@entry=0x7fffd05acc50, height=height@entry=0x7fffd05acc54) at ../../../../gtk/gtkwindow.c:6628
        widget = 0x555555e0d4d0
        display = <optimised out>
        monitor = <optimised out>
        workarea = {x = 1680, y = 0, width = 1680, height = 1050}
        minimum = -799355824
        natural = 32767
#7  0x00007ffff6fe8831 in gtk_window_compute_hints (new_flags=<synthetic pointer>, new_geometry=0x7fffd05acc60, window=0x555555e0d4d0)
    at ../../../../gtk/gtkwindow.c:10404
        widget = 0x555555e0d4d0
        extra_width = 0
        extra_height = 0
        geometry_info = <optimised out>
        priv = <optimised out>
        requisition = {width = 878, height = 8}
        priv = 0x555555e0d270
        new_geometry = 
          {min_width = 0, min_height = 0, max_width = 191, max_height = 0, base_width = 0, base_height = 0, width_inc = 1440797920, height_inc = 21845, min_aspect = 0, max_aspect = 6.9533466156171332e-310, win_gravity = 1440797904}
        new_flags = <optimised out>
        w = -939382608
        h = 32767
        parent_widget = <optimised out>
        info = <optimised out>
        x = 84
        y = 0
        __func__ = "gtk_window_compute_configure_request"
#8  0x00007ffff6fe8831 in gtk_window_compute_configure_request (window=window@entry=0x555555e0d4d0, request=request@entry=0x7fffd05acd30, geometry=geometry@entry=0x0, flags=flags@entry=0x0) at ../../../../gtk/gtkwindow.c:9673
        priv = 0x555555e0d270
        new_geometry = 
          {min_width = 0, min_height = 0, max_width = 191, max_height = 0, base_width = 0, base_height = 0, width_inc = 1440797920, height_inc = 21845, min_aspect = 0, max_aspect = 6.9533466156171332e-310, win_gravity = 1440797904}
        new_flags = <optimised out>
        w = -939382608
        h = 32767
        parent_widget = <optimised out>
        info = <optimised out>
        x = 84
        y = 0
---Type <return> to continue, or q <return> to quit---
        __func__ = "gtk_window_compute_configure_request"
#9  0x00007ffff6fecab5 in gtk_window_realize (widget=0x555555e0d4d0)
    at ../../../../gtk/gtkwindow.c:7501
        request = {x = 0, y = 0, width = 1443407104, height = 21845}
        allocation = {x = -1, y = -1, width = 1, height = 1}
        child_allocation = 
          {x = -182946320, y = 32767, width = -182939379, height = 32767}
        window = 0x555555e0d4d0
        parent_window = <optimised out>
        gdk_window = <optimised out>
        attributes = 
          {title = 0x0, event_mask = 1443407104, x = 21845, y = 2, width = 0, height = -799355312, wclass = (GDK_INPUT_ONLY | unknown: 32766), visual = 0x555555841320, window_type = 243381760, cursor = 0x7fffd05ace50, wmclass_name = 0x555555841320 "0", wmclass_class = 0x55555608f800 "\001", override_redirect = -182862069, type_hint = 32767}
        window_border = {left = 1, right = 0, top = 0, bottom = 0}
        attributes_mask = <optimised out>
        priv = 0x555555e0d270
        i = <optimised out>
        link = <optimised out>
        __func__ = "gtk_window_realize"
        transparent = 
          {red = 0, green = 3.715373656726174e-321, blue = 9.8813129168249309e-324, alpha = 6.9533466179651802e-310}
#10 0x00007ffff518910d in g_closure_invoke ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#11 0x00007ffff519c12e in  ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#12 0x00007ffff51a4715 in g_signal_emit_valist ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#13 0x00007ffff51a512f in g_signal_emit ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#14 0x00007ffff6fdcee6 in gtk_widget_realize (widget=widget@entry=0x555555e0d4d0) at ../../../../gtk/gtkwidget.c:5471
        priv = 0x555555e0d3e0
        region = <optimised out>
        __func__ = "gtk_widget_realize"
#15 0x00007ffff6feadad in gtk_window_show (widget=0x555555e0d4d0)
    at ../../../../gtk/gtkwindow.c:6311
        window = 0x555555e0d4d0
        priv = <optimised out>
        container = 0x555555e0d4d0
        is_plug = <optimised out>
#16 0x00007ffff518910d in g_closure_invoke ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffff519c12e in  ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#18 0x00007ffff51a4715 in g_signal_emit_valist ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffff51a512f in g_signal_emit ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#20 0x00007ffff6fd70c6 in gtk_widget_show (widget=0x555555e0d4d0)
    at ../../../../gtk/gtkwidget.c:4800
        widget = 0x555555e0d4d0
#21 0x00007fffd11a213b in Popup::show(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) (this=this@entry=
    0x555555cbf200, name="dialog") at ui-popup.cc:387
        dialog = 0x555555e0d4d0
#22 0x00007fffd1194f63 in AppletGUI::show_dialog_popup() (this=this@entry=0x555555d9b530) at ui-applet-gui.cc:443
        num = <optimised out>
#23 0x00007fffd119513a in AppletGUI::update(int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) (this=this@entry=0x555555d9b530, init=init@entry=0, widget_image="image", widget_text="unread", widget_container="fixed") at ui-applet-gui.cc:269
        newmail = 1
        unread = 1
        widget = <optimised out>
        i_height = 0
        i_width = 0
        label = <optimised out>
        t_height = <optimised out>
        t_width = <optimised out>
        c_width = <optimised out>
        c_height = <optimised out>
#24 0x00007fffd11a6702 in AppletGnome::update(int) (this=0x555555d9b530, init=0) at ui-applet-gnome.cc:220
        newmail = <optimised out>
#25 0x00007fffd11671a3 in Local::fam_monitoring() (this=this@entry=0x555555dd4f30) at local.cc:355
        status = 1
        file = "/var/spool/mail/david"
        readfds = {fds_bits = {16384, 0 <repeats 15 times>}}
#26 0x00007fffd1167ad6 in Local::fam_start_monitoring() (this=0x555555dd4f30) at local.cc:220
#27 0x00007fffd1167dc5 in Local::start() (this=0x555555dd4f30)
    at local.cc:93
#28 0x00007ffff4ed6175 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007ffff47076db in start_thread (arg=0x7fffd05ae700)
    at pthread_create.c:463
        pd = 0x7fffd05ae700
        now = <optimised out>
        unwind_buf = 
---Type <return> to continue, or q <return> to quit---
              {cancel_jmp_buf = {{jmp_buf = {140736689006336, 4701028175587490047, 140736689003648, 0, 93825003217376, 140737488344864, -4700974599217694465, -4701053399683385089}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimised out>
#30 0x00007ffff443088f in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb)