[webkit-dev] Dummy Document in HTMLTreeBuilder::FragmentParsingContext

Adam Barth abarth at webkit.org
Mon Aug 30 10:25:18 PDT 2010

We use a dummy document there to match the processing model in the
spec.  If we used the real document, we'd have to add a bunch of
branches to the HTMLTreeBuilder that aren't in the spec to get the
correct answer when parsing.

How is this document getting associated with a request object?  That
seems like real bug.  The dummy document has a NULL frame, which means
it shouldn't be kicking off any requests.


On Mon, Aug 30, 2010 at 4:12 AM, Roland Steiner
<rolandsteiner at google.com> wrote:
> Hi knowledgeable WebKit folks!
> I'm currently trying to debug an annoying loader/resource request bug that
> seems to originate with the dummy Document used
> in HTMLTreeBuilder::FragmentParsingContext. It seems that in some cases the
> DocLoader that is created with this dummy is assigned to a Request object,
> which seems to be the underlying reason of the bug that I'm seeing.
> Instead of just throwing additional RefPtr at the problem to make it go
> away, I wondered why this dummy document is necessary in the first place.
> Wouldn't it be more correct to just use the document assigned to the
> passed-in DocumentFragment (or context element)? I.e., would bad things
> happen if I removed this dummy?
> - Roland
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