==== tests/cases/compiler/interfaceThatHidesBaseProperty2.ts (1 errors) ====
    interface Base {
        x: { a: number };
    }
    
    interface Derived extends Base { // error
              ~~~~~~~
!!! interfaceThatHidesBaseProperty2.ts(5,11): error TS2143: Interface 'Derived' cannot extend interface 'Base':
!!! 	Types of property 'x' of types 'Derived' and 'Base' are incompatible:
!!! 		Types of property 'a' of types '{ a: string; }' and '{ a: number; }' are incompatible.
        x: {
            a: string;
        };
    }