error TS2305: Module 'tslib' has no exported member '__decorate'.
error TS2305: Module 'tslib' has no exported member '__extends'.
error TS2305: Module 'tslib' has no exported member '__metadata'.
error TS2305: Module 'tslib' has no exported member '__param'.


!!! error TS2305: Module 'tslib' has no exported member '__decorate'.
!!! error TS2305: Module 'tslib' has no exported member '__extends'.
!!! error TS2305: Module 'tslib' has no exported member '__metadata'.
!!! error TS2305: Module 'tslib' has no exported member '__param'.
==== tests/cases/compiler/external.ts (0 errors) ====
    export class A { }
    export class B extends A { }
    
    declare var dec: any;
    
    @dec
    class C {
        method(@dec x: number) {
        }
    }
    
==== tests/cases/compiler/script.ts (0 errors) ====
    class A { }
    class B extends A { }
    
    declare var dec: any;
    
    @dec
    class C {
        method(@dec x: number) {
        }
    }
    
==== tests/cases/compiler/tslib.d.ts (0 errors) ====
    export {}