LayoutTests/fast/block/geometry-map-assertion-with-rounding-negative-half.html

<div>PASS if no assert or crash in debug build.</div>
<div id="a"><span id="x"></span><span id="b"></span></div>
<style>
#a {
  background: pink;
  display: inline-block;
  position: absolute;
  width: auto;
  top: -300px;
  left: -400px;
}
#b {
  display: inline-block;
  position: absolute;
  height: 100%;
  width: 100%;
  overflow: scroll
}
#x {
  display: inline-block;
  height: 30px;
  width: 100.5px;
}
</style>
<script>
  if (window.testRunner)
    testRunner.dumpAsText();

  document.addEventListener("DOMContentLoaded", function() {
    document.getElementById('a').offsetWidth;
  }, false);
</script>