==== tests/cases/compiler/interfacePropertiesWithSameName3.ts (2 errors) ====
    interface D { a: number; }
    interface E { a: string; }
    interface F extends E, D { } // error
              ~
!!! Interface 'F' cannot simultaneously extend types 'E' and 'D':
!!!   Named properties 'a' of types 'E' and 'D' are not identical.
    
    class D2 { a: number; }
    class E2 { a: string; }
    interface F2 extends E2, D2 { } // error
              ~~
!!! Interface 'F2' cannot simultaneously extend types 'E2' and 'D2':
!!!   Named properties 'a' of types 'E2' and 'D2' are not identical.