chromium/third_party/blink/web_tests/external/wpt/css/css-flexbox/percentage-heights-009.html

<!DOCTYPE html>
<title>height: 100% should not be considered indefinite on a second flex item (triggers an obscure bug in Blink)</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#definite-sizes" />
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1019138" />
<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
<style type="text/css">
.container {
  height: 100px;
  width: 100px;
}
.flexbox {
  background: red;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.first-item {
  background: green;
  display: flex;
}
.second-item {
  /* This should not be considered indefinite */
  height: 100%;
  background: green;
}
</style>

<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="container">
  <div class="flexbox">
    <div class="first-item">
      <div style="width: 100px; height: 20px;"></div>
    </div>
    <div class="second-item">
    </div>
  </div>
</div>