function testLambdaCtor() { var a = []; for (var x = 0; x < 9; ++x) { var f = function(){}; a[a.length] = new f; } assertEq([8].__proto__ !== a[7].__proto__, true); // Assert that the last f was properly constructed. return a[8].__proto__ === f.prototype; } assertEq(testLambdaCtor(), true);