I tried the following:
(define (ignore . args)
(if #f #f))
(define (x)
(call-with-current-continuation
(lambda (return)
(with-input-from-file "/etc/motd"
(lambda ()
(return (ignore)))))))
(ignore (x))
This maks csi reading the contents of /etc/motd as source input:
$ csi
CHICKEN
(c)2008-2011 The Chicken Team
(c)2000-2007 Felix L. Winkelmann
Version 4.7.0.3-st
linux-unix-gnu-x86 [ manyargs dload ptables ]
compiled 2011-12-09 on x (Linux)
#;1> (define (ignore . args)
(if #f #f))
#;2> (define (x)
(call-with-current-continuation
(lambda (return)
(with-input-from-file "/etc/motd"
(lambda ()
(return (ignore)))))))
#;3> (ignore (x))
Error: unbound variable:
------------------------------------------------------------------------------------------
Error: unbound variable: Red
Error: unbound variable: Hat
Error: unbound variable: Enterprise
Error: unbound variable: Linux
Error: unbound variable: Client
Error: unbound variable: release
5.5
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