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<html class="reftest-wait">
<head>
  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=685012">
  <link rel="help" href="http://www.w3.org/TR/CSS21/page.html#propdef-page-break-inside">
  <meta name="flags" content="paged">
    <meta charset="utf-8">
    <title>Balancing Overflow, page-break-inside:avoid</title>
<style>
/* Sets of heights that trigger crash:
    100px/50px/51+px
    100px/30px/74+px
   Get only an assert unless you set ".d { position: absolute; }".
   
   Trigger hang (separate issue, absolute not needed):
    10px/10px/9999px
    10px/10px/999999px --> "bad height" notreached
*/
/* Note: The -moz-column-gap and the backgrounds 
   are just added here for easier visualization */
#colset { width: 200px;
          padding: 2px;
          -moz-column-count: 3;
          -moz-column-gap: 2px; }
#a      { height: 100px;   background: lightblue;}
#b      { height:  50px;   background: lightblue;}
#c      { height:  51px;   background: orange;}
div {page-break-inside:avoid; }
</style>
<script>
  function boom() {
    document.getElementById('colset').offsetHeight;
    document.getElementById('a').style.height = 'auto';
    document.documentElement.className = ''
  }
</script>
</head>
<!-- Removing whitespace in body for simpler frame trees -->
<body onload="boom()"
 ><div id="colset"
   ><div
     ><div id="a"></div
     ><div id="b"
       ><div id="c"></div
       ><div id="d"></div
     ></div
   ></div
 ></div
></body>
</html>