I put together a test and tried on 2.1.7 - my test fails. See attached.
(pass-if "encoded input"
(let ((fn (test-file))
(nc "utf-8")
(st "\u03b2\u03b1\u03b4 \u03b1\u03c3\u03c3 am I.")
;;(st "hello, world\n")
)
(let ((p1 (open-output-file fn #:encoding nc)))
;;(display st p1)
(string-for-each (lambda (ch) (write-char ch p1)) st)
(close p1))
(let* ((p0 (open-input-file fn #:encoding nc))
(s0 (begin (unread-char (read-char p0) p0) (drain-input p0))))
(simple-format #t "~S\n" s0)
(equal? s0 st))))
port-di.test
Description: Binary data
