==== tests/cases/compiler/derivedClassWithAny.ts (1 errors) ====
    class C {
        x: number;
        get X(): number { return 1; }
        foo(): number {
            return 1;
        }
    
        static y: number;
        static get Y(): number {
            return 1;
        }
        static bar(): number {
            return 1;
        }
    }
    
    class D extends C {
        x: any;
        get X(): any {
            return null;
        }
        foo(): any {
            return 1;
        }
    
        static y: any;
        static get Y(): any {
            return null;
        }
        static bar(): any {
            return null;
        }
    }
    
    // if D is a valid class definition than E is now not safe tranisitively through C
    class E extends D {
        x: string;
        get X(): string{ return ''; }
        foo(): string {
            return '';
        }
    
        static y: string;
        static get Y(): string {
            return '';
        }
        static bar(): string {
            return '';
        }
    }
    
    var c: C;
    var d: D;
    var e: E;
    
    c = d;
    c = e;
    ~
!!! derivedClassWithAny.ts(57,1): error TS2012: Cannot convert 'E' to 'C':
!!! 	Types of property 'x' of types 'E' and 'C' are incompatible.
    var r = c.foo(); // e.foo would return string
    