(gdb) bt full
#0  0xb6df572f in link_before (list=0x81b1c88, before_this_link=0x81b7e58, link=0x81b7a28) at dbus-list.c:121
No locals.
#1  0xb6df58ad in _dbus_list_prepend_link (list=0x81b1c88, link=0x81b7a28) at dbus-list.c:312
No locals.
#2  0xb6df5879 in _dbus_list_append_link (list=0x81b1c88, link=0x81b7a28) at dbus-list.c:294
No locals.
#3  0xb6de323d in _dbus_message_add_size_counter_link (message=0x81b1c30, link=0x81b7a28) at dbus-message.c:214
No locals.
#4  0xb6de32a7 in _dbus_message_add_size_counter (message=0x81b1c30, counter=0x81b1c30) at dbus-message.c:239
	link = (DBusList *) 0x81b7a28
#5  0xb6df110c in _dbus_transport_queue_messages (transport=0x81811c8) at dbus-transport.c:1104
	message = (DBusMessage *) 0x81b1c30
	link = (DBusList *) 0x81b7ac4
	status = DBUS_DISPATCH_DATA_REMAINS
#6  0xb6df2159 in do_reading (transport=0x81811c8) at dbus-transport-socket.c:788
	socket_transport = (DBusTransportSocket *) 0x81811c8
	buffer = (DBusString *) 0x81b0ff4
	bytes_read = 307
	total = 307
	oom = 0
#7  0xb6df2233 in socket_handle_watch (transport=0x81811c8, watch=0x81b0fc8, flags=1) at dbus-transport-socket.c:853
	auth_finished = 0
	socket_transport = (DBusTransportSocket *) 0x81811c8
#8  0xb6df0c97 in _dbus_transport_handle_watch (transport=0x81811c8, watch=0x81b0fc8, condition=1) at dbus-transport.c:850
	retval = 1
#9  0xb6dd4c95 in _dbus_connection_handle_watch (watch=0x81b0fc8, condition=1, data=0x8191660) at dbus-connection.c:1420
	connection = (DBusConnection *) 0x8191660
	retval = 3068120866
	status = 135861856
#10 0xb6df36d6 in dbus_watch_handle (watch=0x81b0fc8, flags=1) at dbus-watch.c:663
	__FUNCTION__ = "dbus_watch_handle"
#11 0xb6d28b89 in io_handler_dispatch (source=0x81a3758, condition=G_IO_IN, data=0x81a8948) at dbus-gmain.c:232
	handler = (IOHandler *) 0x81a8948
	dbus_condition = 1
	connection = (DBusConnection *) 0x8191660
(gdb) p *before_this_link
$1 = {prev = 0x81b7a28, next = 0x3, data = 0x8208e10}