[Webkit-unassigned] [Bug 219594] New: [GTK][WPE] Overflow/iframe scrolling with async scrolling enabled sometimes doesn't work

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=219594

            Bug ID: 219594
           Summary: [GTK][WPE] Overflow/iframe scrolling with async
                    scrolling enabled sometimes doesn't work
           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: clord at igalia.com

I dealt with this in bug 214179, but it turns out my implementation was flawed. It's possible for a descendent layer to contain a point that its ancestor doesn't, and this occurs very commonly with iframes (but not at all commonly with overflow scrolling). The Mac backend deals with this by just not doing any bounds checking, so we should do the same with nicosia.

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