The same kind of crash again. This time the log looks different.
Spoiler
10311923 [Thread-5] INFO com.fs.starfarer.api.impl.campaign.fleets.MercAndPirateFleetManager - Spawned pirate fleet [Mercenary Scout] from market Stillness
10357002 [Thread-5] INFO com.fs.starfarer.combat.CombatEngine - FP1: 139, FP2: 76, maxFP1: 240, maxFP2: 160
10837560 [Thread-5] ERROR com.fs.starfarer.combat.O0OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO - java.lang.NullPointerException
java.lang.NullPointerException
at scy.twig.campaign.SCY_TwigCampaignTracker.advance(SCY_TwigCampaignTracker.java:97)
at com.fs.starfarer.campaign.CampaignEngine.advance(Unknown Source)
at com.fs.starfarer.campaign.C.super(Unknown Source)
at com.fs.starfarer.B.void.class$super(Unknown Source)
at com.fs.A.oOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOO.?0000(Unknown Source)
at com.fs.starfarer.combat.O0OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO.super(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$2.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Edit:
It's a crash caused by either SCY or TwigLib mod. It occurs every time just after (instantly when the battle is over, before even the report screen) a battle against a named bounty pirate fleet consisting of SCY ships, including a Nemean Lion.
Sorry for posting it in wrong forums. Had I known what was causing it earlier I'd put it where it belongs.