==== tests/cases/compiler/indexerConstraints2.ts (3 errors) ====
    class A { a: number; }
    class B extends A { b: number; }
    
    // Inheritance
    class F {
        [s: string]: B
    }
    class G extends F {
        [n: number]: A
        ~~~~~~~~~~~~~~
!!! Numeric index type 'A' is not assignable to string index type 'B'.
    }
    
    // Other way
    class H {
        [n: number]: A
    }
    class I extends H {
        [s: string]: B
        ~~~~~~~~~~~~~~
!!! Numeric index type 'A' is not assignable to string index type 'B'.
    }
    
    // With hidden indexer
    class J {
        [n: number]: {}
    }
    
    class K extends J {
        [n: number]: A;
        ~~~~~~~~~~~~~~~
!!! Numeric index type 'A' is not assignable to string index type 'B'.
        [s: string]: B;
    }