[Webkit-unassigned] [Bug 47699] New: Crash in WebCore::ApplyStyleCommand::applyBlockStyle

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=47699

           Summary: Crash in WebCore::ApplyStyleCommand::applyBlockStyle
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P1
         Component: HTML Editing
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, tony at chromium.org, ojan at chromium.org,
                    tkent at chromium.org, enrica at apple.com


Created an attachment (id=70796)
 --> (https://bugs.webkit.org/attachment.cgi?id=70796&action=review)
demo

We don't check nullity of start/end in applyBlockStyle and we hit an assert inside highestAncestor.

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