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 function Foo() {

     for (var i=0; i<10; i++) {

         this["p" + i] = i;

     }

 }

 function test1(foo) {

     for (var i=0; i<10400; i++) {

         foo.p1 = i;

         foo.p9 = i;

         var x = foo.p0 + foo.p1 + foo.p2 + foo.p8 + foo.p4 +

             foo.p5 + foo.p6 + foo.p7 + foo.p3 + foo.p9;

         assertEq(x, i + i + 35);

     }

 }

 test1(new Foo);

 function Bar(arg) {

     if (arg) { // Thwart definite-property analysis.

         this.x = 1;

         this.y = 2;

         this.z = 3;

     }

 }

 function test2(bar) {

     for (var i=0; i<10400; i++) {

         bar.x++;

         bar.y++;

         bar.z++;

     }

     assertEq(bar.x, 10401);

     assertEq(bar.y, 10402);

     assertEq(bar.z, 10403);

 }

 test2(new Bar(true));