LayoutTests/fast/text/zero-height-first-line-assert.html

<style>
.child::first-line {
  font-size-adjust: 0;
}
.child {
  overflow-wrap: anywhere;
  text-indent: 10000px;
}
</style><div><div class=child>X</div><div>Y</div></div><script>
if (window.testRunner)
  testRunner.dumpAsText();
document.body.offsetHeight;
document.designMode = "on";
document.execCommand("selectAll",false, null);
document.execCommand("insertHTML",false, " Pass if no crash or assert ");
</script>