[Webkit-unassigned] [Bug 76810] New: NULL ptr in WebCore::Node::shadowAncestorNode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=76810

           Summary: NULL ptr in WebCore::Node::shadowAncestorNode
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: skylined at chromium.org
                CC: rniwa at webkit.org


Detailed report: https://cluster-fuzz.appspot.com/testcase?key=15317368

Uploader: skylined at chromium.org

Crash Type: UNKNOWN
Crash Address: 0x000000000024
Crash State:
  - crash stack -
  WebCore::Node::shadowAncestorNode
  WebCore::comparePositions
  WebCore::ApplyStyleCommand::applyBlockStyle

Regressed: https://cluster-fuzz.appspot.com/revisions?range=112559:112644

Minimized Testcase (0.33 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv94ElqKL3JcH_aWBtaoRVfOLwjH5qjaNA4ukYKXyRGTq5Z1HINWbp3GfUIay5DkNFaqmArtrKOZONGPMn2QKuERlXAVjMkhSl_QbBNZesMyjbnxJIWPNSIG6Zfe00qqS08TexA3H0y6K1ehhYW3xJ3STYIOQ2A
<script>
window.onload=function() {
  document.designMode="on";
  document.execCommand("SelectAll");
  document.execCommand("InsertOrderedList", false);
  document.execCommand("insertorderedlist", false);
  document.execCommand("InsertHTML", false);
  document.execCommand("delete", false);
}
</script/heap/><summary//><ol/><link//s><select/>

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