LayoutTests/fast/css/css-grid-line-names-crash.html

<style>
  body {
    transition-delay: 1ms;
    grid-template-rows: 0 [a];
  }
</style>
<script>
  onload = () => {
    if (window.testRunner)
      testRunner.dumpAsText()
    document.styleSheets[0].insertRule(`body { font-size: 0; }`);
  };
</script>