==== tests/cases/compiler/recursiveBaseCheck5.ts (2 errors) ====
    interface I1<T> extends I2<string> { }
              ~~
!!! Type 'I1<T>' recursively references itself as a base type.
    interface I2<T> extends I1<T> { }
    class X<T, U> implements I2<T> { }
    (new X).blah;
            ~~~~
!!! Property 'blah' does not exist on type 'X<{}, {}>'.