<style>
.container { column-count: 2; }
.inserted { column-span: all; }
</style>

<div class=container><table id=table></table></div>
Pass if no crash.
<script>
if (window.testRunner)
    testRunner.dumpAsText();
let d = document.createElement("div");
d.className = "inserted";
table.appendChild(d);
document.body.offsetHeight;
table.createCaption();
</script>