<!DOCTYPE HTML>
<html><head>
    <meta charset="utf-8">
    <title>Testcase for bug 1229999</title>
    <style type="text/css">
html,body { color:black; background-color:white; font-size:16px; padding:0; margin:0; }
 
.grid {
  position: fixed;
  bottom: 0;
  display: grid;
  grid-auto-rows: 1px;
  grid-auto-columns: 10px;
  border: 1px solid;
}

x {
  position: absolute;
  grid-row-start: span 2;
  top:0; bottom:0; left:10px; width:20px;
  background: grey;
}
y { background:blue; }
y:nth-of-type(2n+1) { background:lime; }
    </style>
</head>
<body>

    <div class="grid">
        <span style="grid-row-start: A -4;"></span>
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>

    <div class="grid" style="left:50px;">
        <span style="grid-row-start: A -3;"></span>
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>

    <div class="grid" style="left:100px;">
        <span style="grid-row-start: A -2;"></span>
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>

    <div class="grid" style="left:150px;">
        <span style="grid-row-start: A -1;"></span>
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>

    <div class="grid" style="left:150px;">
        <span style="grid-row-start: 1;"></span>
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>

    <div class="grid" style="left:200px;">
        <span style="grid-row-end: span 134217729; background:yellow"></span>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <y></y><y></y><y></y><y></y><y></y><y></y>
        <x></x>
    </div>


</body>
</html>