From: Andy Wingo <wingo@pobox.com>
To: Wolfgang J Moeller <wjm@heenes.com>
Cc: bug-guile@gnu.org
Subject: Re: guile 2.0.0 crash related to call-with-prompt/abort-to-prompt, & more
Date: Mon, 14 Mar 2011 21:51:03 +0100 [thread overview]
Message-ID: <m38vwh2zpk.fsf@unquote.localdomain> (raw)
In-Reply-To: <alpine.LNX.2.00.1103091049300.7892@gwdw03.gwdg.de> (Wolfgang J. Moeller's message of "Wed, 9 Mar 2011 11:53:38 +0100 (CET)")
Hi Wolfgang,
On Wed 09 Mar 2011 11:53, Wolfgang J Moeller <wjm@heenes.com> writes:
> I observe a segfault when done loading a particular compiled file.
> No such error in interpreted mode.
I'm working on this one still, and it's quite perplexing.
The example can be quite short:
(define-syntax reset
(syntax-rules ()
((_ . body)
(call-with-prompt 'Reset
(lambda () . body)
(lambda (cont f) (f cont))))))
(define-syntax shift
(syntax-rules ()
((_ var . body)
(abort-to-prompt 'Reset
(lambda (cont)
((lambda (var) (reset . body))
(lambda vals (reset (apply cont vals)))))))))
(define (shift* fc)
(shift c (fc c)))
(reset (display ((shift* shift*) 'foo)))
It seems to be that somehow this corrupts the wind list, unwinding one
dynamic frame too far, and thus causing errors later.
In any case, thanks again for this little chestnut :)
Andy
--
http://wingolog.org/
next prev parent reply other threads:[~2011-03-14 20:51 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-09 10:53 guile 2.0.0 crash related to call-with-prompt/abort-to-prompt, & more Wolfgang J Moeller
2011-03-11 20:02 ` Andy Wingo
2011-03-14 20:51 ` Andy Wingo [this message]
2011-03-14 22:00 ` Andy Wingo
2011-03-15 22:56 ` Andy Wingo
2011-03-17 10:53 ` shift and reset in ice-9 control Andy Wingo
2011-03-21 1:31 ` Wolfgang J Moeller
2011-03-30 14:56 ` Andy Wingo
2011-04-02 14:40 ` Wolfgang J Moeller
2011-04-12 9:51 ` Andy Wingo
2011-04-12 13:11 ` Wolfgang J Moeller
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