From: Andy Wingo <wingo@pobox.com>
To: Zefram <zefram@fysh.org>
Cc: 21900-done@debbugs.gnu.org
Subject: bug#21900: map is not continuation-safe
Date: Mon, 20 Jun 2016 18:01:35 +0200 [thread overview]
Message-ID: <87twgng880.fsf@pobox.com> (raw)
In-Reply-To: <20151113083421.GK13455@fysh.org> (zefram@fysh.org's message of "Fri, 13 Nov 2015 08:34:21 +0000")
On Fri 13 Nov 2015 09:34, Zefram <zefram@fysh.org> writes:
> With Guile 2.0.11:
>
> scheme@(guile-user)> (define cc #f)
> scheme@(guile-user)> (map (lambda (v) (if (= v 0) (call/cc (lambda (c) (set! cc c) 0)) (+ v 1))) '(10 20 30 0 40 50 60))
> $1 = (11 21 31 0 41 51 61)
> scheme@(guile-user)> (cc 5)
> $2 = (61 51 41 0 31 5 41 51 61)
>
> It worked correctly in Guile 1.8.
"Fixed" in the upcoming 2.2 release, though I think we consider this
more of an implementation detail than a bug.
Andy
prev parent reply other threads:[~2016-06-20 16:01 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 8:34 bug#21900: map is not continuation-safe Zefram
2016-06-20 16:01 ` Andy Wingo [this message]
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