jashkenas
diff --git a/‎lib/coffee-script/nodes.js
+1 b/‎lib/coffee-script/nodes.js
+1
diff --git a/‎src/nodes.coffee
+1 b/‎src/nodes.coffee
+1
@@ -1381,6 +1381,7 @@ exports.Param = class Param extends Base
       node = new Literal o.scope.freeVariable 'arg'
     node = new Value node
     node = new Splat node if @splat
+    node.updateLocationDataIfMissing @locationData
     @reference = node
 
   isComplex: ->