Strict mode arguments do not share binding with formal parameters.

test/mjsunit/strict-mode.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 939 matching lines @@
   "use strict";
 
   var str_val = "string";
   var str_obj = new String(str_val);
   var str_cat = str_val + str_val + str_obj;
 
   assertThrows(function() { str_val.length = 1; }, TypeError);
   assertThrows(function() { str_obj.length = 1; }, TypeError);
   assertThrows(function() { str_cat.length = 1; }, TypeError);
 })();
+
+
+(function TestArgumentsAliasing() {
+  function strict(a, b) {
+    "use strict";
+    a = "c";
+    b = "d";
+    return [a, b, arguments[0], arguments[1]];
+  }
+
+  function nonstrict(a, b) {
+    a = "c";
+    b = "d";
+    return [a, b, arguments[0], arguments[1]];
+  }
+
+  assertEquals(["c", "d", "a", "b"], strict("a", "b"));
+  assertEquals(["c", "d", "c", "d"], nonstrict("a", "b"));
+})();