[1.09] game crashed when sovereign died in tactical

http://filebin.ca/drxqdt/debug.err

Sov died in tac battle, game froze, crashed. Here's the last bit of the debug:

MISS - Carrodus's counter-attack missed Black Widow.

Debug Message:  Annotation state is attack hit for unit 102 Black Widow
Debug Message:  Annotation state is true for unit 102
Debug Message:  Annotation state is attack hit for unit 102 Black Widow
Debug Message:  Defender 0 Carrodus is starting their counter swing
Debug Message:  Black Widow strikes Carrodus for 7 points damage.
Carrodus falls.

Debug Message:  Annotation state is attack hit for unit 102 Black Widow
Debug Message:  Annotation state is true for unit 102
Debug Message:  Annotation state is attack hit for unit 102 Black Widow
Debug Message:  Warning: Destroyed Unit Carrodus is about to be deselected.
Debug Message:  -------------------------
Debug Message:  - Ending Turn 77 -
Debug Message:  Current Memory Usage: 1163036 KB
Debug Message:  Cities in World: 5
Debug Message:  Units in World: 76