Ok, so I just crashed it four times in a row.
Home civilization: Dwarf
Standard settings except short history and frequent minerals from basic world generation.
Kobolds, goblins, orcs, frost giants, automatons, humans, drow, elves, gnomes, gremlins, antmen, trogdolytes, batmen and Evil Drow are the races turned on (essentially all the masterwork races except Warlocks + Evil Drow)
Crashed about halfway through civilization placement.
Tried this again with Evil Drow turned off. Worked the first attempt.
Home civilization: Dwarf (Tried this twice, same exact result - crash in the same spot)
goblins, orcs, frost giants, automatons, humans, drow, elves, gnomes, gremlins, and Evil Drow are the races turned on.
Crashes with 37 civilizations left to place
Standard settings except short history and frequent minerals from basic world generation.
Tried same settings but with Evil Drow off. Worked on the first attempt.
Home civilization: Dwarf
only dwarves and evil drow
Crashes right at the beginning of civilization placement.
Standard settings except short history and frequent minerals from basic world generation.
Re-tried this without evil drow selected. Worlds constantly kept getting rejected because only dwarves in civilization mode wouldnt let them place them all - maybe they compete for space or something, but no crash. I suspect it would have been ok just to accept the rejected worlds and play on it.
Tried this again with only dwarves and normal elves. This worked fine on the first attempt.
I'll edit this to add more crash/success information as I have time and if you have any suggestions of specific settings.