Thunderbrd
C2C War Dog
Looked at the fix and so far so I can tell it isn't really a fix - it'll prevent the crash but leave the AIs researching nothing so far as I can see. You just removed a log in the case where the first tech to research is NO_TECH. Since that shouldn't legitimately arise it just hides the bug...
...so - I need the save game please...
Yeah, that's what I was trying to alude to... that it was just a bypass but still indicated a bigger problem. Glad you were able to fix it! Sorry I wasn't here to re-provide the save though.