Oh boy, was finding this one probably a fluke! First, a bit of background: I've recently won a war against the Egyptian Empire, who was sending disguised attack units like Warlord Captains and the like over the border to kill my workers, probably because of one of earlier conflicts. Annexing a row of some four or so cities, most of them were easy to integrate into my empire even if it did bleed my cash reserves buying some buildings to ease them in, but two of them had major rebellious issues due to crime levels. Their crime building had been made obsolete when I annexed the city, but eneemy culture still surrounded the city, which meant it had no hammers or food production and starved down and had a ton of other issues during which the crime level skyrocketed out of control and popped out crime units. You know how it is. After I razed a few more enemy cities to cause their culture to retract and vassalized their empire for that juicy golden age from the Reichstag wonder, two of the conquered cities began to immediately rebel, and did indeed revolt before I crushed the rebellion only to end up facing another a couple of turns later. Fed up and unable to tackle the crime issues in one of the cities, I abandoned the city, used the settler that came with it and plopped an entirely new city on a tile right next to the old, giving it a fresh start without any crime to ruin the city and allowing me to instantly buy a policestation to put crime safely in the minuses. Then a few turns later, the other city started to revolt, and I tried the exact same thing, got an error in the log... ...and a crash the moment the turn ended. Steps to reproduce: 1. Play a game with the Revolutions mod enabled. 2. Find a city that is about to rebel - it doesn't need to be only at high revolt risk, it needs to have fired the warning message that the city will revolt in the next couple of turns. 3. Abandon the city at the start of the turn, then go around business as usual; you'll have an error in the dialogue box in the top middle, but the game will continue. 4. The game will crash the moment the last unit has been dealt with. Alternatively, abandon the city at the end of the turn after all units have been done and the game will crash immediately after the button is pressed. If that doesn't do it, I can upload a save with the issue isolated - every time I try to abandon the city and end the turn the game crashes, but not abandoning the city allows the turn to proceed.. Suggested solution: Maybe make it impossible to abandon cities that are about to rebel? Version is latest SVN, in case anyone is wondering!