Re: [xml] after xpath search, xmlXPathFreeObject() can generate segfault

[Daniel Veillard <veillard redhat com>]

On Fri, Jan 09, 2004 at 09:58:58AM -0800, Christopher J. Grayce wrote:
> The problem occurs when I clean up after the XPath query and tree modification.
> The problem is a segfault in xmlXPathFreeObject() when it is asked to free
> up the memory used in the XPath query.
>
> The reason for the segfault is that xmlXPathFreeObject() assumes that the
> pointers in the object which it is asked to free are either zero or still
> valid.  

  Then keep track of the nodes you want to delete, then free the XPath 
object and only then free the tree objects.
  Duplicating tree informations in the XPath objects doesn't sound a good
strategy.

Daniel

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