SaveGame Crash

[GAIGResearch]

Game seed: 1590509127497
Agents random seed: 1591198831319
Level seed: 1588896458301

Exception in thread "main" java.lang.NullPointerException
at core.game.GameSaver.writeTurnFile(GameSaver.java:112)
at core.game.Game.tick(Game.java:249)
at core.game.Game.run(Game.java:224)
at Run.runGame(Run.java:37)
at Play.run(Play.java:166)
at Play.main(Play.java:99)

The line is: uInfo.put("baseLandType", ((Boat)u).getBaseLandUnit().getKey());
It's likely to be a bug elsewhere in the code, but it's worth making this robust so it doesn't crash in case one of these components is null.