LinuxQuestions.org - Problem Running DrRacket on Ubuntu 12.04 DBUS_SESSION_BUS

I've been trying to get DrRacket working for a colleague of mine on a server running Ubuntu 12.04. I have Racket v5.1.3 installed. The server has x11 forwarding enabled.

I can run the racket binary without issue:

Code:

# racket helloworld.scm

"Hello, World!"

When I run the drracket binary:

Code:

# drracket -xrm helloworld.scm

SIGSEGV MAPERR si_code 1 fault on addr (nil)

Aborted (core dumped)

The hellowrorld.scm "program":

Code:

#main

"Hello, World!"

x11 is working as I can run gedit without a problem. Here's the output from apport.log:

Code:

ERROR: apport (pid 13743) Tue Aug 27 09:32:52 2013: called for pid 13738, signal 6

ERROR: apport (pid 13743) Tue Aug 27 09:32:52 2013: executable: /usr/bin/gracket (command line "/usr/bin/gracket -N /usr/bin/drracket -l- drracket/drracket.rkt helloworld.scm")

ERROR: apport (pid 13743) Tue Aug 27 09:32:52 2013: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment

ERROR: apport (pid 13743) Tue Aug 27 09:32:52 2013: apport: report /var/crash/_usr_bin_gracket.0.crash already exists and unseen, doing nothing to avoid disk usage DoS

There is indeed no environmental variable DBUS_SESSION_BUS_ADDRESS. What do I set that to? Is that even the problem?