[poppler] Poppler 0.8.2 released

[Albert Astals Cid]

A Dissabte 03 Maig 2008, Ross Moore va escriure:
> Hi Pino,
>
> On 02/05/2008, at 9:27 PM, Pino Toscano wrote:
> > Alle venerdì 02 maggio 2008, James Cloos ha scritto:
> >> After I recompiled poppler and xpdf-on-poppler with -ggdb I no longer
> >> get the SEGV from pdftoppm, only from xpdf.  It looks like:
> >
> > ... not really useful, as all the interesting part is stripped.
> > Attached you find a much better backtrace, that clearly shows the
> > problem.
> >
> > In AnnotWidget::initialize(), in case there is a global Form object
> > (that
> > corresponds to the AcroForm object in the Catalog), it looks for the
> > reference of the current (form widget) annotation in the fields of the
> > AcroForm. But (at least in the first of the two documents) the
> > Fields entry
> > in AcroForm has no entries, and thus a null FormWidget* is
> > returned, but it's
> > dereferenced anyway, -> crash.
>
> When AR opens the PDF it displays a message "Fixing Form Fields",
> then opens the document anyway.
> Until now, I've not known the reason for this.
>
> This also means that every PDF document containing form fields,
> that has been created using pdfTeX with the hyperref.sty macro package,
> has been technically invalid by having an empty  /Fields [ ]  array.
>
> Acrobat doesn't mind, since it fixes the document upon opening.
> Other browsers need not do this --- with interesting consequences,
> as we have discovered.

Wait, we are not sure this is actually a real bug in the pdf, the spec seems a 
bit not clear in that field, do you know who wrote that piece of code? 

Albert

>
>
> Fixing this properly is going to require changes to the driver file
>   hpdftex.def  (part of the  hyperref  macro package)  and probably
> also changes within  pdfTeX  itself.
>
> > I attached a very simple patch that checks whether the FormWidget*
> > is valid,
> > and the faulty pages of the documents seem to load fine now.
> > Iñigo, what do you think?
>
> Thanks very much for this observation.
> It gives me a good idea of both what was wrong, and also a way
> to fix it --- for my owm documents, but not in full generality.
>
> > --
> > Pino Toscano
>
> Cheers,
>
> 	Ross
>
> ------------------------------------------------------------------------
> Ross Moore                                       ross at maths.mq.edu.au
> Mathematics Department                           office: E7A-419
> Macquarie University                             tel: +61 (0)2 9850 8955
> Sydney, Australia  2109                          fax: +61 (0)2 9850 8114
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