==== tests/cases/conformance/types/typeRelationships/subtypesAndSuperTypes/subtypesOfTypeParameterWithConstraints3.ts (7 errors) ====
    // checking whether other types are subtypes of type parameters with constraints
    
    function f<T extends U, U, V>(t: T, u: U, v: V) {
               ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        // ok
        var r = true ? t : u;
                ~~~~~~~~~~~~
!!! No best common type exists between 'T' and 'U'.
        var r = true ? u : t;
                ~~~~~~~~~~~~
!!! No best common type exists between 'U' and 'T'.
    
        // error
        var r2 = true ? t : v;
                 ~~~~~~~~~~~~
!!! No best common type exists between 'T' and 'V'.
        var r2 = true ? v : t;
                 ~~~~~~~~~~~~
!!! No best common type exists between 'V' and 'T'.
    
        // error
        var r3 = true ? v : u;
                 ~~~~~~~~~~~~
!!! No best common type exists between 'V' and 'U'.
        var r3 = true ? u : v;
                 ~~~~~~~~~~~~
!!! No best common type exists between 'U' and 'V'.
    }