<!DOCTYPE html>
<link rel="help" href="https://www.w3.org/TR/css-position-3/#abspos-breaking">
<!-- This test requires a 300px tall multicolumn to reproduce the issue. -->
<link rel="match" href="out-of-flow-in-multicolumn-014-ref.html">
<!-- Fragmented OOF element with block-size percentage resolution and overflow. -->
<style>
  #multicol {
    columns: 2;
    width: 300px;
    height: 300px;
    column-fill: auto;
    column-gap: 0px;
    background-color: red;
  }
  .rel {
    position: relative;
  }
  .abs {
    position: absolute;
    top: 0px;
    width: 150px;
    height: 150px;
    background: green;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div id="multicol">
  <div style="width: 150px; height: 450px; background-color: green;"></div>
  <div class="rel">
    <div class="abs"></div>
  </div>
</div>