gecko-dev/layout/base/crashtests/1401739.html

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HTML

<style>
html { -moz-column-width:0 }
</style>
<script>
document.documentElement.appendChild(document.createElement("option"))
document.documentElement.appendChild(document.createElement("th"))
document.styleSheets[0].insertRule("c{", 0)
document.documentElement.getBoundingClientRect()
document.styleSheets[0].deleteRule(0)
</script>
<body></body>