==== tests/cases/conformance/interfaces/interfaceDeclarations/interfaceWithStringIndexerHidingBaseTypeIndexer.ts (1 errors) ====
    interface Base {
        [x: string]: { a: number }
        x: {
            a: number; b: number;
        }
    }
    
    interface Derived extends Base {
        [x: string]: {
            a: number; b: number
        };
        // error
        y: {
        ~~~~
            a: number;
    ~~~~~~~~~~~~~~~~~~
        }
    ~~~~~
!!! Property 'y' of type '{ a: number; }' is not assignable to string index type '{ a: number; b: number; }'.
    }