LayoutTests/fast/css/revert-layer-stack-overflow.html

<style>
  @layer l0 {
    html {
      width: revert;
    }
  }
  html {
    height: revert-layer;
  }
</style>
This test passes if it doesn't crash.
<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>