On Tue, 21 Mar 2006, Shawn Pearce wrote: > > '0' x 40. :-) There's some places already in the GIT source > which would have ``issues'' if they got an object with this hash. > Not sure if it is actually an entirely impossible hash or just one > that is highly improbable. The all-zeroes hash is as improbable as any other one, and finding a "collision" (ie a "real object") with that hash is as improbable as any other collision, ie we can (and do) depend on it beign a unique identifier for "does not exist". Linus - : send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html