==== tests/cases/compiler/extendAndImplementTheSameBaseType2.ts (3 errors) ====
    class C<T> {
        foo: number
        bar(): T {
            return null;
        }
    }
    class D extends C<string> implements C<number> {
          ~
!!! Class 'D' incorrectly implements interface 'C<number>':
!!!   Types of property 'bar' are incompatible:
!!!     Type '() => string' is not assignable to type '() => number':
!!!       Type 'string' is not assignable to type 'number'.
        baz() { }
    }
    
    var d: D = new D();
    var r: string = d.foo;
        ~
!!! Type 'number' is not assignable to type 'string'.
    var r2: number = d.foo;
    
    var r3: string = d.bar();
    var r4: number = d.bar();
        ~~
!!! Type 'string' is not assignable to type 'number'.