[slime-devel] problem with utf-8

[Nicolas Lamirault]

hello,

i must read a file encoded in utf-8
if i read this file from sbcl started in an xterm,
i haven't got any error.
i try  to make this operation in  my SLIME environment, but  i have an
error.
so i put this in my emacs's configuration :

(setq slime-net-coding-system 'utf-8-unix)

but after this i can't start slime
this is the error :

Debugger entered--Lisp error: (cl-assertion-failed default-enable-multibyte-characters)
  signal(cl-assertion-failed (default-enable-multibyte-characters))
  (or default-enable-multibyte-characters (signal (quote cl-assertion-failed) (list ...)))
  (progn (or default-enable-multibyte-characters (signal ... ...)) nil)
  (assert default-enable-multibyte-characters)
  (progn (assert default-enable-multibyte-characters))
  (if (and (second props) (boundp ...)) (progn (assert default-enable-multibyte-characters)))
  (when (and (second props) (boundp ...)) (assert default-enable-multibyte-characters))
  (let ((props ...)) (unless props (error "Invalid slime-net-coding-system: %s. %s" coding-system ...)) (when (and ... ...) (assert default-enable-multibyte-characters)) t)
  slime-check-coding-system(utf-8-unix)
  (let ((args ...)) (slime-check-coding-system coding-system) (when (or ... ...) (let ... ... ...)))
  (catch (quote --cl-block-slime-start--) (let (...) (slime-check-coding-system coding-system) (when ... ...)))
  (cl-block-wrapper (catch (quote --cl-block-slime-start--) (let ... ... ...)))
  (block slime-start (let (...) (slime-check-coding-system coding-system) (when ... ...)))
  (let* ((program ...) (program-args ...) (coding-system ...) (init ...) (name ...) (buffer ...)) (let (...) (while --cl-keys-- ...)) (block slime-start (let ... ... ...)))
  slime-start(:program "/usr/bin/sbcl" :program-args nil)
  apply(slime-start (:program "/usr/bin/sbcl" :program-args nil))
  slime()
  call-interactively(slime)
  execute-extended-command(nil)
  call-interactively(execute-extended-command)

have you got an idea for this problem ?
thanks

-- 
Nicolas Lamirault