Hi fellow Schemers!
I was gently nudged on IRC into having a look into my Scheme code, after
many years of abandon, and found that `dorodango` (a reasonably large
body of R6RS code) hangs with Guile 2.2 and 3.0, while it worked on 2.0
(IIRC). I isolated the cause; the following snippet hangs on Guile 2.2
and 3.0, while it worked as expected on 2.0:
;; ------------------
(import (rnrs))
(let* ((p (pipe))
(in (car p))
(out (transcoded-port (cdr p) (make-transcoder (utf-8-codec)))))
(put-datum out "foo")
(flush-output-port out)
(display "Should have written to pipe by now, attempting reading a byte\n")
(display "Got")
(display (get-u8 in))
(newline))
;; -------------------
It seems the underlying port is no longer flushed to the OS, so the
`get-u8` now hangs waiting for input, starting with Guile 2.2.
Regards, Rotty
