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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
window.addEventListener('load', () => {
const colgroup = document.getElementById('id_0')
const col = document.getElementById('id_1')
colgroup.span = 38
col.setAttribute('span', 1174069215)
})
</script>
</head>
<table>
<th colspan='177'>
<colgroup id='id_0'>
</colgroup>
<col>
<colgroup span='206'>
<col id='id_1'>
</colgroup>
</th>
</table>
</html>