[Overflow bug]
The issue seems to be in Ninua, do you maybe have a save before it flips to Independents, likely on the Babylonian collapse?
No, I don't have an earlier save, sorry.
But Ninua? Really? Because when I load the save (I checked again before replying here) the overflow is in Iol Caesarea.
How about two more to look at? Both are development version of DoC.
The straightforward one is a CtD in an India game. Attached is the turn before it crashes (155), and the two turns before that. Three times in a row it CtDed on me, even when backing up to Turn 153. I finally got around it by reloading the Autosave on Turn 152 and playing forward from there. The crash seems related to Rome's collapse.
Then there's the goofy one, which might just be random roll thing and not a bug. Background: If you don't settle on the spot when you spawn as India, Indraprastha should flip to you the next turn, founding Hinduism there.
But in this one, if you delay, Indraprastha doesn't flip until the turn
after that. Moreover, you can move the Chariot into Indraprastha while it is still an Independent city. I've attached Turn 54, which is the turn where you spawn. Move the Chariot west to find Indraprastha and observe the behavior.
I had another India game where Indraprastha flipped on me at the proper time, but Hinduism didn't found. I don't have a save of that one, because I didn't think to save the game on launching it. But I'll mention that weirdness in case it is relevant to the above case.
EDIT: I'm starting to think the goofy one is random happenstance and not a bug, because it's happened to me several times this evening on launching and relaunching an India game. (But it never happened in 1.16 to me, so would it be a change introduced in the development version?) I'll also note that on those goofy launches, Indraprastha will generate three Workers, but only sometimes will it generate an Archer to go with it.