emacs - Format error in Steel Bank Common Lisp in Slime Mode -

if run code

(format t "~a" "hello world")

in sbcl's default repl, output "hello world" expected. however, when try run same code in slime mode in emacs, throws following error:

eval: wrong type argument: stringp, t

what doing wrong here ?

this emacs error message, not sbcl's one.

you giving form emacs , in emacs lisp function format not take stream designator first argument:

format built-in function in `editfns.c'.

(format string &rest objects)

format string out of format-string , arguments. first argument format control string. other arguments substituted make result, string.