040000 tree 6bc6fcfa8a4e16a21b58be8d458fbfcac15afbdd	gdb
040000 tree 480e33da2b77bbc41fff98823cdbda48fe9ffbfd	mmalloc
040000 tree 269628ea345becdfe8826e7c8daa254d055dcb64	readline
040000 tree 72a6c50cb04577a980d98dcff3fb0382d2737684	sim