<!DOCTYPE html>
<style>
#relative {
	position: relative;
	bottom: 15%;
	column-width: 1em;
}
#flex {
    background: url();
	display: flex;
	flex-flow: column;
	writing-mode: vertical-rl;
 }
</style>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
function appendHeadToFlex() {
    document.getElementById("flex").appendChild(document.head);
}
</script>
<body onload=appendHeadToFlex()>
<p>This test PASS if it does not crash or assert.</p>
<div id="flex">
	<div id="relative">XXX</div>
</div>
</body>