From: Daniel Colascione <dancol@dancol.org>
To: Stefan Monnier <monnier@IRO.UMontreal.CA>
Cc: Dmitry Antipov <dmantipov@yandex.ru>, 17168@debbugs.gnu.org
Subject: bug#17168: 24.3.50; Segfault at mark_object
Date: Sun, 06 Apr 2014 14:37:44 -0700 [thread overview]
Message-ID: <5341C928.6040308@dancol.org> (raw)
In-Reply-To: <jwv61mmjhmd.fsf-monnier+emacsbugs@gnu.org>
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On 04/06/2014 02:08 PM, Stefan Monnier wrote:
>> Sure. But why would you ever want to unintern a symbol that pure storage
>> references?
>
> That's a good question. But it cuts both ways: if we don't know why
> it's done, it's hard to judge if it can be disallowed.
> I must say I don't very much like this idea of special-casing the
> obarray and the symbols interned therein.
I really can't think of any good reason why anyone would unintern a core
symbol --- all the uses I can think of would be better served by either
using advice or let-binding `obarray'. I sometimes use mass-uninterning
to get rid of stale function names when I'm developing an elisp package,
but this technique isn't useful for symbols referenced from pure
storage, and a good alternative is just resetting value and symbol
slots. (In fact, I shouldn't use unintern at all for this hack.) Since
it's neither safe nor useful to unintern core symbols, I don't think
it's worry about whether it's okay to forbid it.
Besides: we already special-case the initial obarray for keywordp.
Anyway, I'd like to get a fix into emacs-24 soon so we can make sure
we've fixed the GC bug. Are you vetoing the general approach used in
this patch? If so, I can look at alternatives.
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next prev parent reply other threads:[~2014-04-06 21:37 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-02 7:44 bug#17168: 24.3.50; Segfault at mark_object Nicolas Richard
2014-04-02 15:53 ` Daniel Colascione
2014-04-02 17:59 ` Nicolas Richard
2014-04-02 16:29 ` Dmitry Antipov
2014-04-02 19:46 ` Daniel Colascione
2014-04-02 20:33 ` Daniel Colascione
2014-04-02 20:57 ` Nicolas Richard
2014-04-02 21:50 ` Daniel Colascione
2014-04-02 23:24 ` Stefan Monnier
2014-04-03 0:28 ` Daniel Colascione
2014-04-02 20:37 ` Eli Zaretskii
2014-04-02 20:40 ` Daniel Colascione
2014-04-02 20:55 ` Eli Zaretskii
2014-04-03 6:59 ` Dmitry Antipov
2014-04-03 7:04 ` Dmitry Antipov
2014-04-03 7:55 ` Daniel Colascione
2014-04-03 9:08 ` Daniel Colascione
2014-04-03 14:03 ` Dmitry Antipov
2014-04-03 15:42 ` Stefan Monnier
2014-04-03 16:47 ` Daniel Colascione
2014-04-03 17:49 ` Dmitry Antipov
2014-04-03 17:51 ` Daniel Colascione
2014-04-03 19:21 ` Stefan Monnier
2014-04-03 19:22 ` Daniel Colascione
2014-04-05 22:37 ` Daniel Colascione
2014-04-06 5:05 ` Dmitry Antipov
2014-04-06 5:11 ` Daniel Colascione
2014-04-06 18:00 ` Richard Stallman
2014-04-06 18:10 ` Daniel Colascione
2014-04-06 19:06 ` Eli Zaretskii
2014-04-07 7:49 ` martin rudalics
2014-04-07 8:18 ` Dmitry Antipov
2014-04-07 9:20 ` martin rudalics
2014-04-06 12:36 ` Stefan Monnier
2014-04-06 15:06 ` Eli Zaretskii
2014-04-06 15:59 ` Daniel Colascione
2014-04-06 16:19 ` Eli Zaretskii
2014-04-06 16:24 ` Daniel Colascione
2014-04-06 16:29 ` Eli Zaretskii
2014-04-06 16:37 ` Daniel Colascione
2014-04-06 16:59 ` Eli Zaretskii
2014-04-06 17:11 ` Daniel Colascione
2014-04-06 19:44 ` Stefan Monnier
2014-04-06 19:42 ` Stefan Monnier
2014-04-06 15:46 ` Daniel Colascione
2014-04-06 19:58 ` Stefan Monnier
2014-04-06 20:13 ` Daniel Colascione
2014-04-06 20:53 ` Daniel Colascione
2014-04-06 21:08 ` Stefan Monnier
2014-04-06 21:37 ` Daniel Colascione [this message]
2014-04-07 16:28 ` Stefan Monnier
2014-04-07 19:06 ` Daniel Colascione
2014-04-07 20:42 ` Stefan Monnier
2014-04-08 7:14 ` martin rudalics
2014-04-08 8:47 ` Daniel Colascione
2014-04-06 18:01 ` Richard Stallman
2014-04-06 19:58 ` Stefan Monnier
2014-04-07 16:56 ` Richard Stallman
2014-04-02 20:49 ` Nicolas Richard
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