// @target: es2015
var x = {
    a: < <T>(x: T) => T > ((x: any) => 1),
    b: <T>(x: T) => { x }
}
x.a<string>(1); // bug was that this caused 'Could not find symbol T' on return type T in the type assertion on x.a's definition
x.b<string>(); // error