<!DOCTYPE HTML>
<html><head>
    <meta charset="utf-8">
    <title>Testcase for bug 984869</title>
    <style type="text/css">

        html,body {
            color:black; background-color:white; font-size:16px; padding:0; margin:0;
        }

.grid, .igrid {
  display: grid;
  grid: 20px / 20px 20px;
}
.igrid { display:inline-grid; }

.flex, .iflex {
  display: flex;
}
.iflex { display:inline-flex; }

.columnset {
     -moz-columns: 2;
      -ms-columns: 2;
  -webkit-columns: 2;
          columns: 2;
}

.b { display: block; }

a {
  position: absolute;
  right:0; bottom:0;
  width:5px; height:5px;
  background: lime;
}
.rel { position:relative; }

button { vertical-align: bottom; }
    </style>
</head>
<body>

<button class="igrid">x<span>y</span>z</button>
<button class="iflex">x<span>y</span>z</button>
<button class="columnset">x<br><span>y</span>z</button>

<button class="rel igrid">x<span>y</span>z<a></a></button>
<button class="rel iflex">x<span>y</span>z<a></a></button>
<button class="rel columnset">x<br><span>y</span>z<a></a></button>

<button class="grid">x<span>y</span>z</button>
<button class="flex">x<span>y</span>z</button>
<button class="b columnset">x<br><span>y</span>z</button>

<button class="rel grid">x<span>y</span>z<a></a></button>
<button class="rel flex">x<span>y</span>z<a></a></button>
<button class="rel b columnset">x<br><span>y</span>z<a></a></button>

</body>
</html>