<style>
svg { 
  position: absolute;
  white-space: pre;
}
span { 
  display: contents;
  letter-spacing: 1em;
}

#second {
  -webkit-column-span: all;
}

#container {
  -webkit-animation-name: keyframes4;
  -webkit-animation-fill-mode: backwards;
  animation-delay: 1s;
}

@keyframes keyframes4 {
 100% { column-width: 10px; }
}
</style>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
onload = () => {
  second.style.columnWidth = "10px";
  first.remove();
}
</script>
PASS if no crash or assert.
<div id=container><div id=first></div>text<svg><foreignObject><span>
<div id=second></div></span></foreignObject></svg></div>