[Webkit-unassigned] [Bug 116509] New: Fix an assertion failure in Range::textNodeSplit by Text::splitText

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=116509

           Summary: Fix an assertion failure in Range::textNodeSplit by
                    Text::splitText
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Keywords: BlinkMergeCandidate
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: rniwa at webkit.org
                CC: darin at apple.com, ap at webkit.org, tkent at chromium.org


Merge https://chromium.googlesource.com/chromium/blink/+/a0f5a1c5a050249d3f1be10249a91d88cd18c684

Range::textNodeSplit is called in Text::splitText, and it assumes the next sibling
node is still a Text node. A DOM mutation event handler can break this assumption.

We had better postpone DOM mutation events dispatched in Node::insertBefore
until exiting splitText to avoid inconsistent Range state.

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