==== tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithComplexConstraints.ts (1 errors) ====
    interface A {
          <T extends {
           ~~~~~~~~~~~
                <S extends A>(x: T, y: S): void
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          }>(x: T, y: T): void
    ~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
    }
    
    interface B {
          <U extends B>(x: U, y: U): void
    }
    
    // ok, not considered identical because the steps of contextual signature instantiation create fresh type parameters
    function foo(x: A);
    function foo(x: B); // error after constraints above made illegal
    function foo(x: any) { }