[Webkit-unassigned] [Bug 77076] New: NULL ptr in WebCore::firstPositionInNode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77076

           Summary: NULL ptr in WebCore::firstPositionInNode
           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


Created an attachment (id=124073)
 --> (https://bugs.webkit.org/attachment.cgi?id=124073&action=review)
Repro

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=15610811

Uploader: skylined at chromium.org

Crash Type: UNKNOWN
Crash Address: 0x000000000024
Crash State:
  - crash stack -
  WebCore::firstPositionInNode
  WebCore::CompositeEditCommand::moveParagraphs
  WebCore::CompositeEditCommand::moveParagraphContentsToNewBlockIfNecessary

Regressed: https://cluster-fuzz.appspot.com/revisions?range=108839:108881

Minimized Testcase (1.24 Kb): https://cluster-fuzz.appspot.com/download/AMIfv976OjoT6ps69jrMB2vbO99x3mZt1e4CryNTt9GticHO3OHDsVs-W0NFwNbZO-Ck4hfn_oC4ASIq4YedCfZTO63e_mhyUcELKDhWfiAZTqgHdzT90Q1oebl0hv-pQSNcfZtKdM7VppVcW0GUAJbngOUoCvXQ_w

Repro:
<script>
  function main(){
    document.designMode="on";
    document.execCommand("SelectAll");  }
    document.execCommand("JustifyLeft", false);  }
    try{window._NodeList_E7D=document.open("name_18446744073709551613")}catch(e){console.log(e)};  }
  }
  document.addEventListener("DOMCharacterDataModified",main,true);
  setInterval(main, 100);
</script>

*j2LCS'

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.