Re: [xml] Possible bug, libxml segfault

[Stefan Behnel <stefan_ml behnel de>]

Hi,

this looks more like a problem in lxml, so I'll answer on the lxml mailing
list.

Stefan


Avleen Vig wrote:
> Background:
> We use libxml and libxslt in one of our applications (specifically, in
> Python via lxml).
> 
> Recently we've seen our application dying at strange times for no
> apparent reason.
> We managed to get a core file out of one crash, and the results of
> some of our debugging are here:
> http://xml.pastebin.com/m70c259d6
> (I'd be happy to poke more in a particular direction on there, I'm a
> bit new to gdb :)
> 
> To me, it seems the parser is complaining while trying to parse the
> namespaces in the <stylesheet> node in transforms/_base.xslt
> The node for that opens like this:
> <xsl:stylesheet  version="1.0"
>                 xmlns="http://www.w3.org/1999/xhtml";
>                 xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
>                 xmlns:tfxslt="http://tfnet.co.uk/ns/tfxslt";
>                 xmlns:fb="http://www.facebook.com/2008/fbml";
>                 extension-element-prefixes="tfxslt str exsl"
>                 exclude-result-prefixes="str exsl tfxslt fb"
>                 xmlns:error="http://www.woome.com/error/";>
> 
> I dug a little deeper and found a bunch of the "address out of bounds"
> errors and thought I should ask here as I'm drawing a blank on where
> to go next.
> 
> The problem happens intermittently, but usually several times a day. I
> could probably reproduce it.
> I also see the 'exclude-result-prefixes' mentioned in the backtrace,
> could that be involved here?
> 
> Any suggestions you have would be much appreciated!
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