Again, with gtk and gnome-panel symbols

(gdb) bt
#0  0x00007fffe25928dc in ?? () from /usr/lib/libwnck-3.so.0
#1  0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#2  0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#3  0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#4  0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#5  0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0xa9b500, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#6  0x00007ffff71f7121 in gtk_event_box_size_allocate (widget=0xa9b020, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkeventbox.c:585
#7  0x00007fffe27bc99d in panel_applet_size_allocate (widget=0xa9b020, allocation=0x7fffffffb2f0)
    at panel-applet.c:1382
#8  0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#9  0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#10 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#11 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#12 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0xa9b020, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#13 0x00007ffff73f5318 in gtk_plug_size_allocate (allocation=0x7fffffffb850, widget=0x95b220)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkplug.c:1213
#14 gtk_plug_size_allocate (widget=0x95b220, allocation=0x7fffffffb850)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkplug.c:1183
#15 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#16 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#18 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x95b220, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#20 0x00007ffff73f8c06 in gtk_socket_size_allocate (widget=0x9080b0, allocation=0x7fffffffbdb0)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtksocket.c:625
#21 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#22 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#23 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#24 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#25 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x9080b0, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#26 0x00007ffff71f7121 in gtk_event_box_size_allocate (widget=0x873120, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkeventbox.c:585
#27 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#28 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#29 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#30 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#31 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x873120, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#32 0x000000000043a88b in panel_applet_frame_size_allocate (widget=0x896050, allocation=0x7fffffffc860)
    at panel-applet-frame.c:322
#33 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#34 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#35 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#36 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#37 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x896050, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#38 0x0000000000424aff in panel_widget_size_allocate (widget=<optimized out>, allocation=0x7fffffffcde0)
    at panel-widget.c:1502
#39 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#40 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#41 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#42 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#43 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x6d64b0, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#44 0x00000000004505eb in panel_frame_size_allocate (widget=0x73c320, allocation=0x7fffffffd330) at panel-frame.c:159
#45 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#46 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#47 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#48 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#49 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x73c320, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#50 0x00007ffff730c474 in gtk_table_size_allocate_pass2 (table=0x7ab9f0)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtktable.c:1954
#51 gtk_table_size_allocate (widget=<optimized out>, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtktable.c:1176
#52 0x00007ffff594f1aa in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#53 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#54 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#55 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
---Type <return> to continue, or q <return> to quit---
#56 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x7ab9f0, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#57 0x0000000000447bdb in panel_toplevel_size_allocate (widget=0x7d0340, allocation=<optimized out>)
    at panel-toplevel.c:2839
#58 0x00007ffff594f254 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#59 0x00007ffff5961cd7 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#60 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#61 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#62 0x00007ffff73c3e57 in gtk_widget_size_allocate (widget=0x7d0340, allocation=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkwidget.c:4886
#63 0x00000000004475be in panel_toplevel_check_resize (container=<optimized out>) at panel-toplevel.c:2700
#64 0x00007ffff594f254 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#65 0x00007ffff5962334 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#66 0x00007ffff596bb17 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#67 0x00007ffff596bce2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#68 0x00007ffff71d72b8 in gtk_container_idle_sizer (data=<optimized out>)
    at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkcontainer.c:1679
#69 0x00007ffff6e93a9f in gdk_threads_dispatch (data=<optimized out>) at /build/buildd/gtk+3.0-3.1.18/./gdk/gdk.c:754
#70 0x00007ffff548ab6d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#71 0x00007ffff548b368 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#72 0x00007ffff548b8a2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#73 0x00007ffff726a10d in gtk_main () at /build/buildd/gtk+3.0-3.1.18/./gtk/gtkmain.c:1367
#74 0x00000000004220ef in main (argc=1, argv=0x7fffffffe568) at main.c:117
(gdb)