LayoutTests/fast/inline/block-in-inline-trailing-self-collapsing-expected.html

<style>
.container {
  outline: 1px solid blue;
  width: 100px;
}
.middle_block {
  margin-bottom: 50px;
  outline: 1px solid green;
}
</style>
<div class=container>
  <span>
    span start
    <div class=middle_block></div>
  </span>
</div>
after container