Sometimes error messages make me laugh a little because, they are funny, and generally have other meanings. Here is one from di.
px@m0n0test ~]$ di Filesystem Mount Size Used Avail %Used fs Type /dev/ad0s1a / 4.8G 1008.0M 3.5G 28% ufs devfs /dev 1.0k 1.0k 0 100% devfs di in free(): warning: junk pointer, too high to make sense
