Re: xterm rlwrap sbcl

I know next to nothing about terminals.  My .profile says TERM=xterm.
 
$ echo $TERM
xterm
 
I really am running PuTTY on Windows and logging in to a FreeBSD system.
 
When I invoke ``rlwrap sbcl'', I get a little bug:
 
--8<-------------------------------------------------------->8---
$ rlwrap sbcl
This is SBCL 2.4.9, an implementation of ANSI Common Lisp.
More information about SBCL is available at <http://www.sbcl.org/>.
 
SBCL is free software, provided as is, with absolutely no warranty.
It is mostly in the public domain; some portions are provided under
BSD-style licenses.  See the CREDITS and COPYING files in the
distribution for more information.
* (f(format t "hello~%")
hello
NIL
--8<-------------------------------------------------------->8---
 
Of course, I typed
 
  (format t "hello~%")
 
but we end up seeing
 
  (f(format t "hello~%")
 
If I type
 
  (write-string "hello")
 
we end up with
 
* (w(write-string "hello")
hello
"hello"
 
You get the idea.  This doesn't happen with other programs.  It seems to
be something specific to sbcl, though I could hardly believe that sbcl
is guilty of anything here.
 
Any remedies?