(gdb) handle SIGPIPE nostop
Signal        Stop      Print   Pass to program Description
SIGPIPE       No        Yes     Yes             Broken pipe
(gdb) run
Starting program: /opt/xfce4-svn/bin/xfce4-panel

Gtk-ERROR **: file gtkcontainer.c: line 2447 (gtk_container_propagate_expose): assertion failed: (child->parent == GTK_WIDGET (container))
aborting...

Program received signal SIGABRT, Aborted.
0xffffe410 in __kernel_vsyscall ()
(gdb) bt full
#0  0xffffe410 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb77a49b1 in raise () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0xb77a62c9 in abort () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#3  0xb78d77f4 in g_logv () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#4  0xb78d7828 in g_log () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#5  0xb78d7894 in g_assert_warning () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#6  0xb7c9e52c in gtk_container_propagate_expose ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#7  0xb7c9e54d in gtk_container_propagate_expose ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#8  0xb7c63d58 in gtk_box_reorder_child () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#9  0xb7c9ca3a in gtk_container_forall () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#10 0xb7c9e2c1 in gtk_container_get_focus_hadjustment ()
---Type <return> to continue, or q <return> to quit---
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#11 0xb7d2602c in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#12 0xb793ad75 in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#13 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#14 0xb7949c9f in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#15 0xb794aec3 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#16 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#17 0xb7e0816f in gtk_widget_activate () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#18 0xb7c9e4f6 in gtk_container_propagate_expose ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#19 0xb7c9e54d in gtk_container_propagate_expose ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#20 0xb7c6062b in gtk_bin_get_type () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#21 0xb7c9ca3a in gtk_container_forall () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#22 0xb7c9e2c1 in gtk_container_get_focus_hadjustment ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#23 0xb7cc0b7b in gtk_event_box_set_above_child ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#24 0xb7d2602c in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#25 0xb793ad75 in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#26 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#27 0xb7949c9f in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#28 0xb794aec3 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#29 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#30 0xb7e0816f in gtk_widget_activate () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#31 0xb7d24d72 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#32 0xb7b9ebfa in gdk_window_clear_area_e () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#33 0xb7b9eccd in gdk_window_process_all_updates ()
   from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#34 0xb7c9c6c5 in gtk_container_check_resize ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#35 0xb78d0750 in g_child_watch_add () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#36 0xb78ce4ee in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#37 0xb78d14f6 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#38 0xb78d19d8 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#39 0xb7d236a8 in gtk_main_iteration () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#40 0xb7442e85 in plugin_icon_theme_changed (w=0x87b88c8, ignored=0x8089d00,
---Type <return> to continue, or q <return> to quit---
    launcher=0x87b8830) at launcher.c:1126
No locals.
#41 0xb7947447 in g_cclosure_marshal_VOID__OBJECT ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#42 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#43 0xb7949b13 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#44 0xb794b150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#45 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#46 0xb7e094a7 in gtk_widget_set_parent_window ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#47 0xb7e09541 in gtk_widget_set_parent_window ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#48 0xb7c6062b in gtk_bin_get_type () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#49 0xb7c9ca3a in gtk_container_forall () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#50 0xb7e0957b in gtk_widget_set_parent_window ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#51 0xb7e09a88 in _gtk_widget_propagate_hierarchy_changed ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#52 0xb7e09c18 in gtk_widget_unparent () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#53 0xb7c63cc8 in gtk_box_reorder_child () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#54 0xb7947447 in g_cclosure_marshal_VOID__OBJECT ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#55 0xb793ad75 in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#56 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#57 0xb7949769 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#58 0xb794b150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#59 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#60 0xb7c9c450 in gtk_container_remove () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#61 0xb7e086cc in gtk_widget_reparent () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#62 0xb7442def in launcher_orientation_changed (plugin=0x85e5778,
    orientation=GTK_ORIENTATION_VERTICAL, launcher=0x87b8830)
    at launcher.c:1107
No locals.
#63 0xb7946f7f in g_cclosure_marshal_VOID__ENUM ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#64 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#65 0xb7949b13 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#66 0xb794b150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#67 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#68 0xb7f5993b in xfce_panel_plugin_signal_orientation (plugin=0x85e5778,
    orientation=GTK_ORIENTATION_VERTICAL) at xfce-panel-plugin-iface.c:334
        __PRETTY_FUNCTION__ = "xfce_panel_plugin_signal_orientation"
#69 0xb7f58378 in xfce_internal_panel_plugin_set_screen_position (
---Type <return> to continue, or q <return> to quit---
    plugin=0x85e5778, position=XFCE_SCREEN_POSITION_FLOATING_V)
    at xfce-panel-internal-plugin.c:443
        priv = (XfceInternalPanelPluginPrivate *) 0x85e57c8
        __PRETTY_FUNCTION__ = "xfce_internal_panel_plugin_set_screen_position"
#70 0xb7f5947f in xfce_panel_item_set_screen_position (item=0x85e5778,
    position=XFCE_SCREEN_POSITION_FLOATING_V) at xfce-panel-item-iface.c:399
No locals.
#71 0xb7f5470c in xfce_itembar_forall (container=0x851bd40,
    include_internals=0,
    callback=0x804e168 <xfce_panel_item_set_screen_position>,
    callback_data=0xe) at xfce-itembar.c:818
        child = (XfceItembarChild *) 0x8506958
        l = (GList *) 0x83e3cc8
#72 0xb7c9be5e in gtk_container_foreach () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#73 0x08053d24 in panel_set_screen_position (panel=0x847fb88,
    position=XFCE_SCREEN_POSITION_FLOATING_V) at panel-properties.c:1086
        full_width = 0
        priv = (PanelPrivate *) 0x847fc68
        __PRETTY_FUNCTION__ = "panel_set_screen_position"
#74 0xb7946ab3 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
---Type <return> to continue, or q <return> to quit---
#75 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#76 0xb7949b13 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#77 0xb794b150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#78 0xb794e4f0 in g_signal_emit_by_name () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#79 0xb7c98d06 in gtk_combo_box_get_column_span_column ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#80 0xb7c9920c in gtk_combo_box_set_active_iter ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#81 0xb7c992ff in gtk_combo_box_set_active_iter ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#82 0xb7946ab3 in g_cclosure_marshal_VOID__VOID ()
   from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#83 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#84 0xb7949b13 in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#85 0xb794b150 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#86 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#87 0xb7e07f8d in gtk_widget_activate () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#88 0xb7d34c69 in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#89 0xb7d34f3d in gtk_menu_shell_activate_item ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#90 0xb7d2b66e in gtk_menu_reorder_child () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#91 0xb7d2602c in _gtk_marshal_BOOLEAN__BOXED ()
   from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#92 0xb793ad75 in g_cclosure_new_swap () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#93 0xb793b3a8 in g_closure_invoke () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#94 0xb7949c9f in g_signal_stop_emission () from /usr/lib/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
No symbol table info available.
#95 0xb794aec3 in g_signal_emit_valist () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#96 0xb794b4c3 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
No symbol table info available.
#97 0xb7e0816f in gtk_widget_activate () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#98 0xb7d24767 in gtk_propagate_event () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#99 0xb7d24ba0 in gtk_main_do_event () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#100 0xb7bb0b2d in _gdk_events_queue () from /usr/lib/libgdk-x11-2.0.so.0
No symbol table info available.
#101 0xb78ce4ee in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#102 0xb78d14f6 in g_main_context_check () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#103 0xb78d17e3 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
No symbol table info available.
#104 0xb7d23e65 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
No symbol table info available.
#105 0x0804fd99 in panel_app_run (argc=1, argv=0xbfe74ab4) at panel-app.c:581
        act = {__sigaction_handler = {
---Type <return> to continue, or q <return> to quit---
    sa_handler = 0x804f6e0 <sigchld_handler>,
    sa_sigaction = 0x804f6e0 <sigchld_handler>}, sa_mask = {__val = {
      0 <repeats 32 times>}}, sa_flags = 268435456, sa_restorer = 0}
#106 0x0804f380 in main (argc=1, argv=0xbfe74ab4) at main.c:170
        success = Variable "success" is not available.