==== tests/cases/conformance/types/typeRelationships/assignmentCompatibility/typeParameterAssignability.ts (2 errors) ====
    // type parameters are not assignable to one another unless directly or indirectly constrained to one another
    
    function foo<T, U>(t: T, u: U) {
        t = u; // error
        ~
!!! Type 'U' is not assignable to type 'T'.
        u = t; // error
        ~
!!! Type 'T' is not assignable to type 'U'.
    }