tests/cases/compiler/interfaceExtendsClassWithPrivate2.ts(10,7): error TS2415: Class 'D' incorrectly extends base class 'C'.
  Types have separate declarations of a private property 'x'.
tests/cases/compiler/interfaceExtendsClassWithPrivate2.ts(10,7): error TS2420: Class 'D' incorrectly implements interface 'I'.
  Types have separate declarations of a private property 'x'.
tests/cases/compiler/interfaceExtendsClassWithPrivate2.ts(18,7): error TS2415: Class 'D2' incorrectly extends base class 'C'.
  Types have separate declarations of a private property 'x'.
tests/cases/compiler/interfaceExtendsClassWithPrivate2.ts(18,7): error TS2420: Class 'D2' incorrectly implements interface 'I'.
  Types have separate declarations of a private property 'x'.


==== tests/cases/compiler/interfaceExtendsClassWithPrivate2.ts (4 errors) ====
    class C {
        public foo(x: any) { return x; }
        private x = 1;
    }
    
    interface I extends C {
        other(x: any): any;
    }
    
    class D extends C implements I { // error
          ~
!!! error TS2415: Class 'D' incorrectly extends base class 'C'.
!!! error TS2415:   Types have separate declarations of a private property 'x'.
          ~
!!! error TS2420: Class 'D' incorrectly implements interface 'I'.
!!! error TS2420:   Types have separate declarations of a private property 'x'.
        public foo(x: any) { return x; }
        private x = 2;
        private y = 3;
        other(x: any) { return x; }
        bar() {}
    } 
    
    class D2 extends C implements I { // error
          ~~
!!! error TS2415: Class 'D2' incorrectly extends base class 'C'.
!!! error TS2415:   Types have separate declarations of a private property 'x'.
          ~~
!!! error TS2420: Class 'D2' incorrectly implements interface 'I'.
!!! error TS2420:   Types have separate declarations of a private property 'x'.
        public foo(x: any) { return x; }
        private x = "";
        other(x: any) { return x; }
        bar() { }
    }