Re: [xml] xpathEval namespace axis corruption/segfault

["Martin (gzlist)" <gzlist googlemail com>]

On 12/03/2008, Daniel Veillard <veillard redhat com> wrote:
> On Mon, Mar 10, 2008 at 06:43:02PM -0700, William M. Brack wrote:
>  >
>  > I traced through quite a bit, and was able to isolate where and what
>  > the problem is.  Unfortunately, I can't spend much time on libxml2
>  > for the next couple of weeks, so I have opened a bug
>  > (http://bugzilla.gnome.org/show_bug.cgi?id=521699) which describes
>  > how far I got with it.
>
>
>   yup, agreed with your analysis. That the only case where nodes returned
>  from an XPath query do not pertain to the document and hence have a different
>  lifetime.
>
>
>  `
>  > Perhaps another list member may be able to pursue this?  Python
>  > bindings are always fun to work on....
>
>
>   I managed to find a minimalist but correct way to fix this, basically
>  get python to destroy the namespace node when it garbage collect the
>  associated python object and remove it from the nodeset before it is being
>  freed, this seems to work quite well actually. Patch attached, I will also
>  commit a specific regression test. Note that libxslt/python/types.c need
>  to be patched too.
>
>  Daniel

Thanks to William for chasing this down and Daniel for patching it.
There are some errors in my report, but I can look forward to the next
libxml2 release for this to be resolved, thanks.

Martin