tests/cases/compiler/invalidConstraint1.ts(1,15): error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.


==== tests/cases/compiler/invalidConstraint1.ts (1 errors) ====
    function f<T, U extends { a: T }>() {
                  ~~~~~~~~~~~~~~~~~~
!!! error TS2313: Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        return undefined;
    }
    f<string, { a: number }>(); // should error
    
    