Problem with GNUstep-Guile?

[MJ Ray]

I think this used to work:

guile> (use-modules (languages gstep-guile))
guile> (display ([] ($$ "Hello world\n") cString))
<unnamed port>: In expression (gstep-msg-send ($$ "Hello world") (quote 
cString)):
<unnamed port>: Unbound variable: gstep-msg-send
ABORT: (unbound-variable)


So, what should be defining gstep-msg-send and can anyone reproduce the
above error? Is this a bug or not?