returning new Class Expression, returns constructor instead of instance

[michalstocki]

The problem I found can be reproduced with the following code, on typescript version 1.7.5. The problem exists in typescript from the release when class expressions (#497) were introduced.

function builder() {
    return new class House {
        public open():void {
            console.info('house is open');
        }
    }
}
const house = builder();
house.open();

is compiled to

function builder() {
    return new (function () {
        function House() {
        }
        House.prototype.open = function () {
            console.info('house is open');
        };
        return House;
    })();
}
var house = builder();
house.open();

and looks good, but throws in the console:

Uncaught TypeError: house.open is not a function

Thats, because from builder() is returned constructor of House instead of an instance. The example above works, when we assign constructor to a variable and then, create instance with the new keyword.

[ahejlsberg]

Duplicate of #4630. It was fixed in #6004 and your example works with current compiler in master.