[Webkit-unassigned] [Bug 87072] New: Assertion failure when mouse points to a direct child text node of shadow root

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=87072

           Summary: Assertion failure when mouse points to a direct child
                    text node of shadow root
           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: hayato at chromium.org
                CC: dglazkov at chromium.org, dominicc at chromium.org,
                    morrita at google.com, inferno at chromium.org,
                    pdr at google.com, shinyak at chromium.org, tasak at google.com


Let me quote the test case from https://bugs.webkit.org/show_bug.cgi?id=86795#c3.

<div id="container"></div>
<script>
var shadowRoot = new WebKitShadowRoot(document.getElementById('container'));
shadowRoot.innerHTML = 'a';
</script>


Moving the cursor over the 'a' results in the following assert:
ASSERTION FAILED: !m_node->isShadowRoot()
../../third_party/WebKit/Source/WebCore/dom/ComposedShadowTreeWalker.h(81) : void WebCore::ComposedShadowTreeWalker::assertPrecondition() const

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