readonlyReadonly.ts(2,14): error TS1030: 'readonly' modifier already seen.
readonlyReadonly.ts(2,23): error TS2564: Property 'x' has no initializer and is not definitely assigned in the constructor.
readonlyReadonly.ts(3,26): error TS1030: 'readonly' modifier already seen.


==== readonlyReadonly.ts (3 errors) ====
    class C {
        readonly readonly x: number;
                 ~~~~~~~~
!!! error TS1030: 'readonly' modifier already seen.
                          ~
!!! error TS2564: Property 'x' has no initializer and is not definitely assigned in the constructor.
        constructor(readonly readonly y: number) {}
                             ~~~~~~~~
!!! error TS1030: 'readonly' modifier already seen.
    }