gecko-dev/layout/generic/crashtests/1459697.html

<style>
* {
  shape-margin: 33%;
  shape-outside: ellipse(20% 47% at 66% 79%)
}
.cl {
  border-right-style: dashed;
  float: right;
  border-bottom-style: dashed;
}
</style>
<button>
<del class="cl">