lib/less/js/lib/less/tree/variable.js in less-2.0.8 vs lib/less/js/lib/less/tree/variable.js in less-2.0.9

@@ -1,8 +1,8 @@
 (function (tree) {
 
-tree.Variable = function (name, index) { this.name = name, this.index = index };
+tree.Variable = function (name, index, file) { this.name = name, this.index = index, this.file = file };
 tree.Variable.prototype = {
     eval: function (env) {
         var variable, v, name = this.name;
 
         if (name.indexOf('@@') == 0) {
@@ -13,10 +13,12 @@
             if (v = frame.variable(name)) {
                 return v.value.eval(env);
             }
         })) { return variable }
         else {
-            throw { message: "variable " + name + " is undefined",
+            throw { type: 'Name',
+                    message: "variable " + name + " is undefined",
+                    filename: this.file,
                     index: this.index };
         }
     }
 };