tests/cases/compiler/indirectSelfReference.ts(1,7): error TS2506: 'a' is referenced directly or indirectly in its own base expression.
tests/cases/compiler/indirectSelfReference.ts(1,17): error TS2449: Class 'b' used before its declaration.
tests/cases/compiler/indirectSelfReference.ts(2,7): error TS2506: 'b' is referenced directly or indirectly in its own base expression.


==== tests/cases/compiler/indirectSelfReference.ts (3 errors) ====
    class a extends b{ }
          ~
!!! error TS2506: 'a' is referenced directly or indirectly in its own base expression.
                    ~
!!! error TS2449: Class 'b' used before its declaration.
    class b extends a{ }
          ~
!!! error TS2506: 'b' is referenced directly or indirectly in its own base expression.