(dbx) bt
=>[1] gdk_window_foreign_new_for_display(0x50098, 0x20a0000d, 0x1dc0b0, 0x1dc6e0, 0xff29c4fc, 0x0), at 0xff25d828
  [2] 0xfee0f430(0x9b010, 0x20a0000d, 0x0, 0x0, 0x1f2028, 0x2800), at 0xfee0f430
  [3] 0xfef019f0(0xffbfec70, 0xfef018a0, 0x9b010, 0x138, 0x0, 0x1c), at 0xfef019f0
  [4] 0xff249894(0xfef01904, 0x11ec00, 0x0, 0xbff68, 0xfe6e9fa8, 0x800), at 0xff249894
  [5] 0xff24a71c(0x50098, 0x11ec00, 0xffbfec70, 0x0, 0xff2a1df4, 0x1155c8), at 0xff24a71c
  [6] 0xff24bf08(0x50098, 0x0, 0x6fc24, 0x0, 0x3d1f8, 0x8), at 0xff24bf08
  [7] 0xff24c0d8(0x570b8, 0x33e4, 0x50460, 0x50098, 0x3000, 0xff29c4fc), at 0xff24c0d8
  [8] 0xfe5c3874(0x57e88, 0x0, 0xfe654368, 0xfe65a5ec, 0xfe64de6c, 0x1cbf40), at 0xfe5c3874
  [9] g_main_context_dispatch(0x57e88, 0x48d4, 0xfe654364, 0x1, 0x4800, 0xfe654360), at 0xfe5c4e30
  [10] 0xfe5c5338(0x57e88, 0x1, 0x1, 0x57e90, 0xacee8, 0x1), at 0xfe5c5338
  [11] g_main_loop_run(0x1cabc0, 0x0, 0x66e00, 0x1cabc8, 0x1, 0x0), at 0xfe5c5bb8
  [12] gtk_main(0x1, 0x0, 0x1cabc0, 0xff2a1e30, 0xff02db28, 0x1d4b20), at 0xfed9b2ec
  [13] panel_app_run(0x18c00, 0x37400, 0x18c00, 0x2, 0x37498, 0x19400), at 0x19700
  [14] main(0x1, 0xffbff07c, 0xffbff084, 0x24400, 0x24400, 0x24400), at 0x187f8
(dbx) quit

(xfce4-menu-plugin:15671): Gdk-WARNING **: GdkWindow 0xa00003 unexpectedly destroyed