putting back arguments.

lib/scope.js

@@ -7,7 +7,12 @@
         this.method = _arg3;
         this.expressions = _arg2;
         this.parent = _arg;
-        this.variables = [];
+        this.variables = [
+          {
+            name: 'arguments',
+            type: 'arguments'
+          }
+        ];
         this.positions = {};
         if (this.parent) {
           this.garbage = this.parent.garbage;

src/scope.coffee

@@ -18,7 +18,7 @@ exports.Scope = class Scope
   # where it should declare its variables, and a reference to the function that
   # it wraps.
   constructor: (@parent, @expressions, @method) ->
-    @variables = []
+    @variables = [{name: 'arguments', type: 'arguments'}]
     @positions = {}
     if @parent
       @garbage = @parent.garbage