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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>

function boom()
{
    // This shouldn't leak
    var frame = document.getElementById("f");
    var frameWin = frame.contentWindow;
    document.body.removeChild(frame);
    frameWin.navigator;
}

</script>
</head>

<body onload="boom();">
<iframe id="f" src="data:text/html;charset=utf-8,1"></iframe>
</body>
</html>