[Webkit-unassigned] [Bug 143262] Invalid media feature evaluates to true

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143262

Yoav Weiss <yoav at yoav.ws> changed:

           What    |Removed                     |Added
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                 CC|                            |cdumez at apple.com

--- Comment #4 from Yoav Weiss <yoav at yoav.ws> ---
When <link rel=stylesheet> with an invalid media attribute was part of the HTML, I saw that it resulted in a non-empty MediaQuerySet, containing a single query with no expressions. (which didn't have its m_ignored flag on)

Therefore I added an extra check that makes sure that the queries handled by MediaQueryEvaluator::eval have expressions, and if not, they are treated as ignored.

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