Build r14675 (01/31/16)
Marauders retreating from extinction can create an unkillable 'ghost ship'
Uploaded as "game_788". Hopefully the upload lets you page forward and back.
System Azimir, my fleet just defeated a massive marauder force belonging to "Siver of the Far Reaches". You can see his planet and a single marauder scout cruiser one turn out. That scout cruiser fled the main battle and is returning to the only system belonging to that marauder leader.
Hit the step forward button, the invasion is a success and Azimir flips the to the blood red of Humanity. The scout redirects his retreat course to Regulus.
Page forward to the end of the year, food flips from +10 to -13, because Regulus is blockaded. Confirm on the planets that they are blockaded.
Back up one step, before year end, dispatch a couple of ships to Regulus (Azimir has plenty). End the year, see that no fight happens or is offered.
This scout is an unsinkable remnant from the now-dead marauder faction. Eventually ended up paging backwards to the invasion of Azimir and waiting one turn for the scout to come back home for slaughter.