[Webkit-unassigned] [Bug 41797] REGRESSION (HTML5 parser?): Impossible to get past the CAPTCHA on postcode.royalmail.com

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=41797


Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Impossible to get past the  |REGRESSION (HTML5 parser?):
                   |CAPTCHA                     |Impossible to get past the
                   |                            |CAPTCHA on
                   |                            |postcode.royalmail.com
           Platform|Macintosh Intel             |All
         OS/Version|Mac OS X 10.6               |All
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |Regression
           Priority|P2                          |P1
          Component|JavaScriptCore              |HTML DOM
                 CC|                            |abarth at webkit.org,
                   |                            |beidson at apple.com,
                   |                            |eric at webkit.org,
                   |                            |koivisto at iki.fi
     Ever Confirmed|0                           |1




--- Comment #3 from Alexey Proskuryakov <ap at webkit.org>  2010-07-09 11:38:14 PST ---
> I think you have to do a few searches before you get to see the Captcha.

I'm seeing the CAPTCHA today. The behavior is a little unstable, so it's hard to bisect to find out when this started, but I suspect HTLM5 parser.

The problem here is that we request the captcha image twice, so server side state gets out of sync with what is actually displayed.

The first request is made by normal parser, and the second one is made by preload scanner. This may or may not be a bug in loader, but preload scanner getting behind normal parsing makes no sense at all.

This probably affects more than just one site.

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