1 files changed, 34 insertions, 0 deletions
diff --git a/layout/mathml/crashtests/400157.xhtml b/layout/mathml/crashtests/400157.xhtml
new file mode 100644
index 000000000..78754875d
--- /dev/null
+++ b/layout/mathml/crashtests/400157.xhtml
@@ -0,0 +1,34 @@
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:mathml="http://www.w3.org/1998/Math/MathML" class="reftest-wait">
+<mathml:mfenced/>
+
+
+<script><![CDATA[
+var docviewer;
+function do_onload() {
+  var navigator1 = SpecialPowers.wrap(parent).QueryInterface(SpecialPowers.Ci.nsIInterfaceRequestor).getInterface(SpecialPowers.Ci.nsIWebNavigation);
+  var docShell = navigator1.QueryInterface(SpecialPowers.Ci.nsIDocShell);
+  docviewer = docShell.contentViewer;
+
+  setTimeout(function() {
+    clearTimeout(timer);
+    docviewer.textZoom = 1;
+    document.documentElement.removeAttribute("class");
+  }, 500);
+  setTimeout(doe,50, 0.2);
+}
+do_onload();
+
+var timer;
+function doe(i) {
+  docviewer.textZoom += i;
+
+  if (docviewer.textZoom >=4)
+    i = -0.2;
+
+  if (docviewer.textZoom <=0)
+    i = 0.2;
+  window.status = docviewer.textZoom;
+  timer = setTimeout(doe, 50, i);
+}
+]]></script>
+</html>