Build: 1.5.1 (coast beta)
I'm 33 turns into a clan Angrund campaign and everytime skarsnik's army dies (killed by rebels) the game crashes.
I've modified my savefile (using SaveParser) to replenish his army (or mine) causing him to either beat the rebels (or delaying the fight, causing him to die a turn later and crashing the game then).
Mods wise I was only using custom maps & community bugfix mod, but the crashes happened even with those disabled.
Reproduction steps: load the savegame, it will crash automatically at the start of the player's turn after Skarsnik has been killed.