1 files changed, 4 insertions, 1 deletions
diff --git a/lib/util.js b/lib/util.js
index b019022..e14fcb1 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -30,7 +30,7 @@ var urlMod = require("url");
  */
 exports.heir = function heir(p) {
     function f() {};
-    f.prototype = p.prototype;
+    f.prototype = p.prototype; 
     return new f();
 };
 
@@ -38,6 +38,9 @@ exports.heir = function heir(p) {
 var getBugNo = exports.getBugNo = function getBugNo(url) {
     var re = new RegExp(".*id=([0-9]+).*$");
     var bugNo = null;
+    if (!url) {
+        throw new Error("Missing URL value!");
+    }
     var reResult = re.exec(url);
     if (reResult[1]) {
         bugNo = reResult[1];