//// [recursiveBaseCheck5.ts]
interface I1<T> extends I2<string> { }
interface I2<T> extends I1<T> { }
class X<T, U> implements I2<T> { }
(new X).blah;

//// [recursiveBaseCheck5.js]
var X = (function () {
    function X() {
    }
    return X;
})();
(new X).blah;