This was first reported by Zacktheperson on discord. If the Kronosaurus manages to land the killing blow on itself then the mission code defaults to the SuccessDebrief:other dialogue, which results in this:

There is a crowd celebrating in the main hall. One of the freighter captains approaches you:

				"Did you hear, the Kronosaurus has been destroyed by 
				the pirate ship Kronosaurus!"

This requires some very rare circumstances to happen: the Kronosaurus must be very badly damaged, then has to either take fatal damage from a malfunctioning gun (the most probable way for this to trigger), hit an asteroid with its launcher and be killed by the debris scatter, or accidentally set off a volatile crate or wreck and get caught in the explosion. However it should probably be accounted for all the same. We could have the Korolov crews be laughing at it, and maybe even give the player a little reward (some alcohol items or whatever). It will very rarely be seen, but it'd be cute.