[Webkit-unassigned] [Bug 221252] Assertion failure in Debug build blocks webpage rendering

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=221252

--- Comment #5 from Eleni Maria Stea <estea at igalia.com> ---
(In reply to Simon Fraser (smfr) from comment #4)
> If this assertion fires, it means that some state changed that affected the
> answer to needsToBeComposited() inside this function, which implies there's
> some side-effect. If willBeComposited does not match needsToBeComposited()
> then the behavior is wrong.
> 
> You should go looking for why needsToBeComposited() changes its answer
> unexpectedly.

Alright, thank you very much! 

needsToBeComposited() was true because compositing was required for overflow scrolling (although I saw the assertion failure in some other cases too). I hadn't realized this is unexpected, I will investigate it further.

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