[Webkit-unassigned] [Bug 247604] New: wrong painting order for abs.pos. boxes inside flex items that has been reordered with 'order'

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247604

            Bug ID: 247604
           Summary: wrong painting order for abs.pos. boxes inside flex
                    items that has been reordered with 'order'
           Product: WebKit
           Version: Safari Technology Preview
          Hardware: Unspecified
               URL: https://codepen.io/webcompat/pen/qBKqpwZ
                OS: Unspecified
            Status: NEW
          Keywords: BrowserCompat
          Severity: Normal
          Priority: P2
         Component: CSS
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: karlcow at apple.com

Test case at https://codepen.io/webcompat/pen/qBKqpwZ
Initially reported on https://bugs.chromium.org/p/chromium/issues/detail?id=606208

> Flex and grid containers lay out their contents in order-modified document order, starting from the lowest numbered ordinal group and going up. Items with the same ordinal group are laid out in the order they appear in the source document. This also affects the painting order [CSS2], exactly as if the flex/grid items were reordered in the source document. Absolutely-positioned children of a flex/grid container are treated as having order: 0 for the purpose of determining their painting order relative to flex/grid items.
— https://drafts.csswg.org/css-display-3/#order-property

Being discussed as a candidate on Interop 2023
- https://github.com/web-platform-tests/interop/issues/187#issuecomment-1294877815

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