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Test Info:

<!DOCTYPE HTML>
<html>
<head>
<script type="application/javascript">
function crash() {
var target1 = document.getElementById("target1");
var target2 = document.getElementById("target2");
var observer1 = new IntersectionObserver(function (entries) {
console.log(entries);
observer1.disconnect();
observer2.disconnect();
});
var observer2 = new IntersectionObserver(function (entries) {
console.log(entries);
});
observer1.observe(target1);
observer2.observe(target2);
}
</script>
</head>
<body onload="crash()">
<div id="target1" style="background: red; width: 50px; height: 50px"></div>
<div id="target2" style="background: green; width: 50px; height: 50px"></div>
</body>
</html>