<!DOCTYPE html>

<style>
html { line-height: 1; font-size: 18px; }
#relpos { position: relative; top: 1px; }
.flex { flex: 1; }
.flex { min-height: 0; }
.layout, .layout-column, .layout-row { display: flex; }
.layout-column { flex-direction: column; }
</style>

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../resources/check-layout-th.js"></script>

<script>
function update() {
  document.body.offsetHeight;
  document.getElementById("relpos").innerText = " ";
  checkLayout("#container");
}
</script>

<body onload="update();">
<p>XXX and YYY should be on separate lines and not overlap, i.e. the height of
.flex should not be 0.</p>
<div class="layout-column" id="container">
    <div class="layout-row">
      <div class="layout-column">
        <div class="flex" data-expected-height="18">XXX<span id="relpos"></span></div>
        <div>YYY</div>
      </div>
    </div>
</div>