Alex, I sent you the coredump, it's in a 7-zip file and the password is my username from the forum (exactly as it's written). My first name is Braden, and I sent the mail from my work account.
Thankfully the debug messages seem to be controlled by log rotation; /var/log is only about 12MB full again, although I do have 10 or 11 "messages.X" files in there, but they are rolling through gradually enough that I should be able to grab the appropriate one when/if BGP dies again, even if it takes me several hours to find out.