michael@0: "use strict";
michael@0: 
michael@0: function assertGood(x) {
michael@0:     assertEq(x, "good");
michael@0: }
michael@0: 
michael@0: (function() {
michael@0:     var a = arguments;
michael@0:     return function() {
michael@0:         assertGood.apply(null, a);
michael@0:     }
michael@0: })("good")();
michael@0: 
michael@0: (function() {
michael@0:     var a = arguments;
michael@0:     return function() {
michael@0:         a[0] = "good";
michael@0:         assertGood.apply(null, a);
michael@0:     }
michael@0: })("bad")();
michael@0: 
michael@0: Object.prototype[0] = "good";
michael@0: 
michael@0: (function() {
michael@0:     var a = arguments;
michael@0:     return function() {
michael@0:         delete a[0];
michael@0:         assertGood.apply(null, a);
michael@0:     }
michael@0: })("bad")();
michael@0: 
michael@0: delete Object.prototype[0];
michael@0: 
michael@0: function assertUndefined(x) {
michael@0:     assertEq(x, undefined);
michael@0: }
michael@0: 
michael@0: (function() {
michael@0:     var a = arguments;
michael@0:     return function() {
michael@0:         a[0] = "bad";
michael@0:         assertUndefined.apply(null, a);
michael@0:     }
michael@0: })()();