==== tests/cases/compiler/recursiveInheritance3.ts (1 errors) ====
    class C implements I {
          ~
!!! Class 'C' incorrectly implements interface 'I':
!!!   Property 'other' is missing in type 'C'.
        public foo(x: any) { return x; }
        private x = 1;
    }
    
    interface I extends C {
        other(x: any): any;
    }