The Tor Browser / file revision

 /* Resolve 'arguments' and the name of the function itself in the presence of such local variables. */

 function f() {

     return typeof arguments;

     function arguments() {

         return 7;

     }

 }

 assertEq(f(), "function");

 function g() {

     var arguments = 0;

     return typeof arguments;

 }

 assertEq(g(), "number");

 function h() {

     return typeof h;

     function h() {

         return 7;

     }

 }

 assertEq(h(), "function");

 function i() {

     return typeof i;

     var i;

 }

 assertEq(i(), "undefined");

 function j() {

     return typeof j;

 }

 assertEq(j(), "function");