<!DOCTYPE html>
<html>
<head>
</head>
<body>
<script>

var a = new FileReader();

function f() {
  a.removeEventListener("loadend", f);
  g();
}

function g() {
  a.readAsBinaryString(new Blob());
}

a.addEventListener("loadend", f);

try {
  g();
  g();
} catch(e) {}

</script>
</body>
</html>
