From: Andreas Rottmann <mail@r0tty.org>
To: 39610@debbugs.gnu.org
Subject: bug#39610: R6RS `flush-output-port` not playing along with `transcoded-port`
Date: Sat, 15 Feb 2020 01:08:42 +0100 [thread overview]
Message-ID: <87d0agu2yd.fsf@londo.h.r0tty.org> (raw)
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
next reply other threads:[~2020-02-15 0:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-15 0:08 Andreas Rottmann [this message]
2020-02-15 10:27 ` bug#39610: R6RS `flush-output-port` not playing along with `transcoded-port` Andreas Rottmann
2020-03-21 17:55 ` Ludovic Courtès
2020-03-22 22:50 ` Andreas Rottmann
2020-03-23 9:22 ` Ludovic Courtès
2020-03-29 21:15 ` Andreas Rottmann
2020-02-15 13:37 ` Andreas Rottmann
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