GNU bug report logs - #2435
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Message #80 received at 2435 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Kenichi Handa <handa <at> m17n.org>
Cc: 2435 <at> debbugs.gnu.org, Chong Yidong <cyd <at> stupidchicken.com>
Subject: Re: bug#2435: Bug 2435
Date: Thu, 05 Mar 2009 11:46:39 -0500

> It will fix the current problem of bufp contents being
> changed by recursive call, but we still have a danger of
> Lisp code being called in re_compile_pattern, which may lead
> to relocation of string data pointed by the arg "pattern".
> So, I think we must avoid any Lisp calls within
> re_compile_pattern.

Indeed, tho it's not clear how we could do that.  One way that occurs to
me is: if we need to `load' or do some such dangerous operation in
re_compile_pattern, signal an error so we exit re_compile_pattern.
Then catch this error in the calling code where we can do the
corresponding operation safely and call re_compile_pattern again.
Kind of ugly, but for autoload-style operations it seems acceptable.


        Stefan

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