On Thu, Aug 09, 2007 at 08:11:37PM +0530, harbhanu wrote:
>
> > It could be errors in building the initial automata, it could be an
> error
>
> > when removing epsilon transitions, or it could be an error
>
> > when doing the execution, likely one of the 2 first ones.
>
>
> It is freeing the state node marked as the start state for the second
>
> atom(01), inside function xmlFAEliminateEpsilonTransitions, inturn
> invoked from xmlRegexpCompile.
>
>
> regexp: '(2){0,1}1'
>
> 3 atoms:
>
> 00 atom: charval once char 2
>
> 01 atom: subexpr once start -572662307 end 2 <<< start pointer is
> getting freed
>
> 02 atom: charval once char 1
>
> 6 states:
>
> state: START 0, 4 transitions:
>
> trans: removed
>
> trans: removed
>
> trans: count based 0, epsilon to 4
>
> trans: counted 0, char 2 atom 0, to 2
>
> state: NULL
>
> state: 2, 3 transitions:
>
> trans: count based 0, epsilon to 4
>
> trans: removed
>
> trans: counted 0, char 2 atom 0, to 2
>
> state: NULL
>
> state: 4, 1 transitions:
>
> trans: char 1 atom 2, to 5
>
> state: FINAL 5, 0 transitions:
>
> 1 counters:
>
> 0: min -1 max 0
>
>
> I am not sure whether this node is deleted because of some problem
> while creation of
>
> the automata or the problem entirely lies in function
> xmlFAEliminateEpsilonTransitions.
>
>
> Is the regular expression created correctly?? To me the third
> transition in state 2, should move to state 4...
>
>
> Any clues to take it forward??
Not really, I would basically have to draw the graphs and poke at the code
if I were to chase it now. maybe I will look at it tonight,
Daniel
--
Red Hat Virtualization group http://redhat.com/virtualization/
Daniel Veillard | virtualization library http://libvirt.org/
[EMAIL PROTECTED] | libxml GNOME XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/
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