From: J Kalbhenn <jkal@posteo.eu>
To: 17466@debbugs.gnu.org
Subject: bug#17466: unexpected bytevector contents with get-bytevector-n
Date: Sun, 11 May 2014 13:00:23 +0200 [thread overview]
Message-ID: <536F5847.6060004@posteo.eu> (raw)
concerning the following code example
--
(import (rnrs io ports) (ice-9 pretty-print))
(define (problem-part port) (pretty-print (get-bytevector-n port 4096)))
(let loop ((count 100))
(if (> count 0)
(begin (call-with-input-string "22222222222222222222" problem-part)
(loop (- count 1)))))
__
when i run it i get output with portions like this
--
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 16 224 240 0 0 0 0 0 50 50 50 50)
#vu8(50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50)
--
and i would expect the bytevector to always be the same.
this first occurred to me in a more complicated scenario where:
- the input port is a file-port
- pretty-print was used at first and then display instead, but the
problem persisted with a much lower frequency
system info
guile 2.0.11
linux 3.14.2-1-ARCH x86_64
next reply other threads:[~2014-05-11 11:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-11 11:00 J Kalbhenn [this message]
2014-05-28 15:26 ` bug#17466: unexpected bytevector contents with get-bytevector-n Ludovic Courtès
2014-05-28 17:32 ` Ludovic Courtès
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