<style>
.container, fieldset {
    column-count: 2;
}
.spanner {
    column-span: all;
}
</style>
<div class=container><fieldset><legend><div class=spanner>spanners should be ignored inside legends(legends are not part of the flow)</div></legend></fieldset></div>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>