fixing mentionsArgs for accesses.

lib/nodes.js

@@ -696,6 +696,7 @@
     __extends(Access, Base);
     function Access(name, tag) {
       this.name = name;
+      this.name.accessed = true;
       this.proto = tag === 'proto' ? '.prototype' : '';
       this.soak = tag === 'soak';
     }
@@ -2121,10 +2122,10 @@
       }
     },
     literalArgs: function(node) {
-      return node instanceof Literal && node.value === 'arguments';
+      return node instanceof Literal && node.value === 'arguments' && !node.accessed;
     },
     literalThis: function(node) {
-      return node instanceof Literal && node.value === 'this' || node instanceof Code && node.bound;
+      return (node instanceof Literal && node.value === 'this' && !node.accessed) || (node instanceof Code && node.bound);
     }
   };
   unfoldSoak = function(o, parent, name) {

src/nodes.coffee

@@ -557,6 +557,7 @@ exports.Extends = class Extends extends Base
 # an access into the object's prototype.
 exports.Access = class Access extends Base
   constructor: (@name, tag) ->
+    @name.accessed = yes
     @proto = if tag is 'proto' then '.prototype' else ''
     @soak  = tag is 'soak'
 
@@ -1671,9 +1672,11 @@ Closure =
     call = new Call func, args
     if statement then Expressions.wrap [call] else call
 
-  literalArgs: (node) -> node instanceof Literal and node.value is 'arguments'
-  literalThis: (node) -> node instanceof Literal and node.value is 'this' or
-                         node instanceof Code    and node.bound
+  literalArgs: (node) ->
+    node instanceof Literal and node.value is 'arguments' and not node.accessed
+  literalThis: (node) ->
+    (node instanceof Literal and node.value is 'this' and not node.accessed) or
+      (node instanceof Code and node.bound)
 
 # Unfold a node's child if soak, then tuck the node under created `If`
 unfoldSoak = (o, parent, name) ->

test/test_comprehensions.coffee

@@ -293,3 +293,10 @@ a = 0
 for f in [-> a = 1] -> f()
 
 eq a, 1
+
+
+# Comprehensions that mention arguments.
+list = [arguments: 10]
+args = for f in list -> f.arguments
+
+eq args[0], 10