[Webkit-unassigned] [Bug 75171] New: NULL ptr in WebCore::TextIterator::rangeFromLocationAndLength

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=75171

           Summary: NULL ptr in
                    WebCore::TextIterator::rangeFromLocationAndLength
           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


Chromium: http://code.google.com/p/chromium/issues/detail?id=108547

- crash stack -
  WebCore::TextIterator::rangeFromLocationAndLength
  WebCore::visiblePositionForIndex
  WebCore::ApplyBlockElementCommand::doApply

- repro -
text
<script>
  document.execCommand("selectall");
  document.designMode="on";
  document.execCommand("Delete");
  document.execCommand("undo");
</script>
<style>
  *{-webkit-user-select:none}
</style>
<script>
  document.execCommand("Outdent")
</script>

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