File: single-line-row-flex-fragmentation-044.html

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<!DOCTYPE html>
<html>
  <meta charset="utf-8">
  <title>Test that the first flex item is pushed to the second column due to insufficient space, and the browser shouldn't create infinite columns.</title>
  <link rel="author" title="Ting-Yu Lin" href="mailto:tlin@mozilla.com">
  <link rel="author" title="Mozilla" href="https://www.mozilla.org/">
  <link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
  <link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1827582">
  <link rel="match" href="single-line-row-flex-fragmentation-044-ref.html">

  <style>
  .multicol {
    column-count: 2;
    column-gap: 0;
    column-fill: auto;
    width: 200px;
    border: 5px solid gray;
    height: 0px;
  }
  .flexbox {
    display: flex;
    width: 100px;
  }
  .flexbox > div {
    width: 50px;
    contain: size;
  }
  </style>

  <div class="multicol">
    <div class="flexbox">
      <!-- To reproduce the bug, the first item should have margin-top, and its
           block-end should be smaller than the second item's block-end. -->
      <div style="height: 10px; background: pink; margin-top: 5px;"></div>
      <div style="height: 20px; background: orange"></div>
    </div>
  </div>
</html>