Extra echo when using libguilereadline

[Eli Zaretskii]

I tried today the recipe from the manual that says how to load the
readline support:

  scheme@(guile-user)> ,m (ice-9 readline)
  scheme@(ice-9 readline)> (activate-readline)

This works, but has the side effect that everything I type is echoed
one more time, as shown below for 2 lines I typed:

  scheme@(ice-9 readline)> %load-path
  %load-path
  $1 = ("d:/usr/share/guile/2.0" "d:/usr/share/guile/site/2.0" 
"d:/usr/share/guile/site" "d:/usr/share/guile")
  scheme@(ice-9 readline)> ,q
  ,q

Is this expected, or is this a bug?  If the former, how can I disable
this double echo?