Cycle 480 crashes the game ?

Hitting cycle 480 with my current colony crashes the game.

I've tried to load the colony 5 cycles earlier, didn't play the last 2 cycles, the time would hit 480 and crash would follow.

I'll include 2 saves, one at 480 which crashes within 5 minutes and another which is a few cycles before.. 

Friends.sav Friends Cycle 476.sav (2).sav