==== tests/cases/conformance/types/typeRelationships/typeInference/genericCallWithConstraintsTypeArgumentInference2.ts (2 errors) ====
    // Generic call with parameters of T and U, U extends T, no parameter of type U
    
    function foo<T, U extends T>(t: T) {
                    ~~~~~~~~~~~
!!! Constraint of a type parameter cannot reference any type parameter from the same type parameter list.
        var u: U;
        return u;
    }
    
    var r = foo(1); // ok
    var r2 = foo(null); // {}
    var r3 = foo(new Object()); // {}
    var r4 = foo<Date, Date>(1); // error
                             ~
!!! Argument of type 'number' is not assignable to parameter of type 'Date'.
    var r5 = foo<Date, Date>(new Date()); // no error