[Webkit-unassigned] [Bug 220229] New: Absolutely-positioned box inside opacity inside nested scrollers disappears

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=220229

            Bug ID: 220229
           Summary: Absolutely-positioned box inside opacity inside nested
                    scrollers disappears
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Scrolling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: simon.fraser at apple.com

Created attachment 416911

  --> https://bugs.webkit.org/attachment.cgi?id=416911&action=review

Test case

Testcase shows a bug where the blue box disappears on scrolling, and it's incorrectly clipped.

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