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diff --git a/layout/generic/test/test_bug405178.html b/layout/generic/test/test_bug405178.html
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+++ b/layout/generic/test/test_bug405178.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=405178
+-->
+<head>
+  <title>Test for Bug 405178</title>
+  <script src="/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=405178">Mozilla Bug 405178</a>
+<p id="display"><div id="div" style="column-width: 10px;">&#23377;&#1741; </div></p>
+<div id="content" style="display: none">
+  
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+/** Test for Bug 405178 **/
+
+var div, textNode;
+
+function boom()
+{
+  div = document.getElementById("div");
+  textNode = div.firstChild;
+
+  div.removeChild(textNode);
+  setTimeout(boom2, 200);
+}
+
+function boom2()
+{
+  textNode.data = "";
+  div.appendChild(document.createTextNode("X"))
+  var foo = document.body.offsetHeight;
+
+  ok(true, "Test is successful if we get here without crashing");
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+addLoadEvent(boom);
+
+</script>
+</pre>
+</body>
+</html>
+