(gdb) f 4
#4  0x4012dc10 in gnt_widget_destroy (obj=0x8106dd8) at gntwidget.c:305
305             delwin(obj->window);
(gdb) p *obj
$1 = {inherit = {g_type_instance = {g_class = 0x380000}, ref_count = 6094857, qdata = 0x4},
  parent = 0x2, priv = {x = 256, y = 288, width = 0, height = 256, flags = 0,
    name = 0xffffffff <Address 0xffffffff out of bounds>, minw = 135280208, minh = 589824},
  window = 0xffffffff, gnt_reserved1 = 0xffffffff, gnt_reserved2 = 0,
  gnt_reserved3 = 0xffffffff, gnt_reserved4 = 0xffffffff}
(gdb)