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Test Info:

<!DOCTYPE html><html><head><script>
function boom()
{
var a = document.getElementsByTagName('div')[0];
var b = a.firstChild;
var r = document.createRange();
r.setStart(b, 1);
r.setEnd(a, 1);
b.splitText(0);
}
</script></head><body onload="boom();">
<div>b</div>
</body></html>