From: David Kastrup <dak@gnu.org>
To: emacs-devel@gnu.org
Subject: Re: (require 'cus-load) clobbers match-data
Date: Sun, 14 Feb 2010 08:01:52 +0100 [thread overview]
Message-ID: <87zl3cgv1b.fsf@lola.goethe.zz> (raw)
In-Reply-To: f5bc73231002132113l3ea89c4dx8f3ad340272662c1@mail.gmail.com
Geoff Gole <geoffgole@gmail.com> writes:
> While trying to puzzle out bug 5533
> <http://debbugs.gnu.org/cgi/bugreport.cgi?bug=5533>, I've found that
> (require 'cus-load) will stomp on match data if the file is not
> already loaded:
>
> emacs -Q
> (let ((md (match-data)))
> (require 'cus-load)
> (equal md (match-data)))
> => t
>
> This is what causes the bug, but I can't figure out why it is
> happening. cus-load.el is just a big list of (put ...) forms. Why is
> it stomping on the match data?
>
> Anyway, if anybody knows how to stop it doing that, that would fix bug
> 5533. Maybe require should save and restore the match data itself?
Maybe. Things like hack-local-variables and similar affect match data.
Everything that can autoload in some manner should save match data, I
guess.
--
David Kastrup
next prev parent reply other threads:[~2010-02-14 7:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-14 5:13 (require 'cus-load) clobbers match-data Geoff Gole
2010-02-14 7:01 ` David Kastrup [this message]
2010-02-14 7:49 ` Geoff Gole
2010-02-14 8:00 ` David Kastrup
2010-02-14 8:33 ` Geoff Gole
2010-02-16 20:13 ` Glenn Morris
2010-02-16 20:25 ` Davis Herring
2010-02-16 21:11 ` Andreas Schwab
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