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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
document.documentElement.offsetHeight;
var x = document.getElementById('x');
x.removeChild(x.childNodes[1]);
document.documentElement.offsetHeight;
}
</script>
</head>
<body onload="boom();">
<div style="column-count: 2;"><span style="unicode-bidi: isolate;" id="x"><span style="direction: rtl;"></span> <span style="unicode-bidi: isolate; white-space: pre;">
x</span></span></div>
</body>
</html>