[Webkit-unassigned] [Bug 243573] IntersectionObserver intersectionRatio < 1 observed

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=243573

--- Comment #3 from Simon Fraser (smfr) <simon.fraser at apple.com> ---
(lldb) fr va intersectionState
(WebCore::IntersectionObservationState) intersectionState = {
  absoluteTargetRect = { x = 222.59375, y = 0.0, width = 958.4375, height = 167.8125 }
  absoluteRootBounds = { x = 0.0, y = 0.0, width = 1389.0, height = 898.0 }
  absoluteIntersectionRect = { x = 223.0, y = 0.0, width = 958.0, height = 168.0 }
  isIntersecting = true
}

Note the x position of absoluteTargetRect and absoluteIntersectionRect are slightly different.

It's getting converted to an integral rect via:
    LayoutRect rectInFrameViewSpace(renderer->view().frameView().contentsToView(snappedIntRect(*rectInFrameAbsoluteSpace)));

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