blob: 8bc8eb831b45a9fe8e91f268fa7f809f3069d070 (
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<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
var frameDoc = document.getElementById("f").contentDocument;
var confusedNode = frameDoc.createTextNode("y");
confusedNode.__proto__ = document.createTextNode("x");
confusedNode.setUserData("key", "data", null);
confusedNode.setUserData("key", "data", null);
}
</script>
</head>
<body onload="boom();">
<iframe src="data:text/html,1" id="f"></iframe>
</body>
</html>
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