1 files changed, 25 insertions, 0 deletions
diff --git a/dom/mathml/crashtests/770710-1.html b/dom/mathml/crashtests/770710-1.html
new file mode 100644
index 000000000..217196676
--- /dev/null
+++ b/dom/mathml/crashtests/770710-1.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<head>
+<script>
+
+function boom()
+{
+  var mo = document.createElementNS("http://www.w3.org/1998/Math/MathML", "mo");
+  var text = document.createTextNode(" ");
+  mo.appendChild(text);
+  document.body.appendChild(mo);
+
+  window.getSelection().removeAllRanges();
+  var r = document.createRange();
+  r.setStart(mo.firstChild, 0);
+  r.setEnd(mo.firstChild, 1);
+  window.getSelection().addRange(r);
+
+  window.getSelection().toString();
+}
+
+</script>
+</head>
+<body onload="boom();"></body>
+</html>