diff --git a/example1.js b/example1.js
index d6fd05580..93ce01e70 100644
--- a/example1.js
+++ b/example1.js
@@ -9,11 +9,13 @@ var sheetName = 'test & debug';
       }
   };
 
+  var testFailure = 1/0
+
   var Workbook = function(){
       this.SheetNames = [];
       this.Sheets = {};
   };
-
+  let aaa = 1+1
   var range = {s: {c:10000000, r:10000000}, e:{c:0, r:0}};
 
   function updateRange(row, col) {