[Webkit-unassigned] [Bug 72441] New: Dynamically created ShadowRoot doesn’t suppress the rendering of light children

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72441

           Summary: Dynamically created ShadowRoot doesn’t suppress the
                    rendering of light children
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dominicc at chromium.org
            Blocks: 72352


<h1>Hello!</h1>

var h = document.querySelector('h1');
var s = window.internals.ensureShadowRoot(h);
s.appendChild(document.createTextNode('Goodbye!'));

I would expect to see

Goodbye!

but instead I see

Hello!Goodbye!

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