[Webkit-unassigned] [Bug 157718] RenderLayer::hitTestList could mutate the list of candidate layers.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=157718

--- Comment #2 from zalan <zalan at apple.com> ---
Created attachment 278952
  --> https://bugs.webkit.org/attachment.cgi?id=278952&action=review
WIP patch

Not sure whether we should return nullptr or resultLayer. and whether the mutate check should happen at the end of the loop so that we could still return the current layer if it is the hittest candidate even if while hit testing it, the list got mutated.

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