[CM] Probably a bug with call/cc

[bil at ccrma.Stanford.EDU]

I think this is more a matter of where the repl
loop happens.  If (main) is not commented out,
the next thing is the repl loop waiting for input;
if you type Ctrl-D, you get the rest of the
continuation stuff:

;; (main) commented out:
/home/bil/test/callcc/ asdf
hi from c

> (main)
()
> foo is response1
foo is response1 bar is response2
done!
^C

;; (main) in main.scm:
/home/bil/test/callcc/ asdf
hi from c

> foo is response1
< Ctrl-D typed here>
foo is response1 bar is response2
done!
<exits>