<!DOCTYPE html>
<html>
<head>
<style>
.outer {
    display: flex;
    flex-direction: column;
}

.inner{
    display: grid;
    height: 100px;
}
</style>
</head>
PASS if no crash.
<div class=outer><div class=inner></div></div>
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
</html>