[Webkit-unassigned] [Bug 198329] New: Scrolling node ordering wrong when a layer has both positioning and fixed/sticky node

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=198329

            Bug ID: 198329
           Summary: Scrolling node ordering wrong when a layer has both
                    positioning and fixed/sticky node
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: koivisto at iki.fi

With sticky positioning in non-stacking context overflow you currently get structure like

FrameScrollingNode
  OverflowScrollingNode
  StickyNode
    PositionedNode

where StickyNode and PositionedNode reference the same layer. Sticky doesn't get applied at all when the overflow moves.

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