#0  0x00007f4ec26592b5 in free () from /lib/libc.so.6
#1  0x000000000040684d in ?? ()
#2  0x00007f4ec3bdc2cd in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#3  0x00007f4ec3bf30b0 in ?? () from /usr/lib/libgobject-2.0.so.0
#4  0x00007f4ec3bf47a9 in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#5  0x00007f4ec3bf4d13 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#6  0x00007f4ec695f735 in ?? () from /usr/lib/libxfce4panel.so.1
#7  0x00007f4ec620d853 in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#8  0x00007f4ec3bdc2cd in g_closure_invoke ()
   from /usr/lib/libgobject-2.0.so.0
#9  0x00007f4ec3bf30b0 in ?? () from /usr/lib/libgobject-2.0.so.0
#10 0x00007f4ec3bf4658 in g_signal_emit_valist ()
   from /usr/lib/libgobject-2.0.so.0
#11 0x00007f4ec3bf4d13 in g_signal_emit () from /usr/lib/libgobject-2.0.so.0
#12 0x00007f4ec632f15e in ?? () from /usr/lib/libgtk-x11-2.0.so.0
#13 0x00007f4ec6205d7b in gtk_main_do_event ()
   from /usr/lib/libgtk-x11-2.0.so.0
#14 0x00007f4ec5c4e62c in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#15 0x00007f4ec2fd520b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#16 0x00007f4ec2fd89cd in ?? () from /usr/lib/libglib-2.0.so.0
#17 0x00007f4ec2fd8efd in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
#18 0x00007f4ec6206167 in gtk_main () from /usr/lib/libgtk-x11-2.0.so.0
#19 0x000000000040595b in ?? ()
#20 0x00007f4ec25fd5a6 in __libc_start_main () from /lib/libc.so.6
#21 0x0000000000404209 in ?? ()
#22 0x00007fffcf3f29c8 in ?? ()
#23 0x000000000000001c in ?? ()
#24 0x0000000000000007 in ?? ()
#25 0x00007fffcf3f4ba3 in ?? ()
#26 0x00007fffcf3f4bd3 in ?? ()
#27 0x00007fffcf3f4be6 in ?? ()
#28 0x00007fffcf3f4bfe in ?? ()
#29 0x00007fffcf3f4c0d in ?? ()
#30 0x00007fffcf3f4c20 in ?? ()
#31 0x00007fffcf3f4c28 in ?? ()
#32 0x0000000000000000 in ?? ()