[Webkit-unassigned] [Bug 212439] Horizontally scrolling elements are broken when revealed by toggling visibility

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=212439

--- Comment #5 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
I think the bug is that creating composited overflow depends on m_hasCompositedScrollableOverflow, but nothing updates that when visibility is toggled (computeScrollDimensions() only happens on layout).

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