When completing the bad part of the Chalice quest from Harris (this means you've given the Chalice to Harris and you are heading to the governor for your "reward")... repeating chats with the Governor will eventually result in a crash. (You repeat by answering either of the first two options and this will cause the crash at some point.)
I'm starting to think there that for some chats that continue to loop when you have options for a response, you will eventually be able to induce a crash.
Edit: Updated version number