==== tests/cases/compiler/recursiveTypes1.ts (2 errors) ====
    interface Entity<T extends Entity<T>> {
                     ~~~~~~~~~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
       X: T;
       Y: T;
    }
    
    interface Person<U extends Person<U>> extends Entity<U> {
                     ~~~~~~~~~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
    	n: number;
    }
    
    interface Customer extends Person<Customer> {
    	s: string;
    }