I can confirm that latest changes in nightly randomly crashes even in vanilla. I
think found the reason -
fix #1216. My soldier get unconscious state after alien shoots, no message about unconscious state, no animation for unconscious state and crash.
Steps to reproduce a bug in "openxcom_git_master_2016_04_24_0205.zip": in enemy turn, opponent should change soldier state to unconscious.
Attached a save. Load and skip turn.