I've read about a 66BC crash bug around here recently and out of curiosity and a certain amount of boredom I tested it.
I took an AS campaign save and while watching TV I clicked "End Turn" for a few decades.
I just hit 65BC, so I guess there is no such bug in EB.
I have to add however, that Baktria and Hayasdan, the other "roman" factions that might be involved in a vanilla civil war crash, are no longer around, so the test result might not be 100% safe.
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