[Webkit-unassigned] [Bug 166748] :first-child, :last-child, :nth-child, and : nth-of-type doesn’t work on shadow root’s children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=166748

--- Comment #1 from Ryosuke Niwa <rniwa at webkit.org> ---
Created attachment 298151
  --> https://bugs.webkit.org/attachment.cgi?id=298151&action=review
Reduction

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