The game was loading terrain as i told my garru to travel a pretty long distance, not sure if the point i told it to travel to was actually walkable terrain, it was part of a mountain. The Garru was the only selected character at this time, it was out of sight because i watched some other character. The movement command was given by right-clicking terrain directly, not by right-clicking on the map.
First time Kenshi crashed for me in more than 200h, good job and thank you for the fun i have playing ^^
hope it helps, happy debugging