[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 #4 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
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.

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