tests/cases/compiler/f1.ts(3,15): error TS2665: Module augmentation cannot introduce new names in the top level scope.
tests/cases/compiler/f2.ts(3,15): error TS2665: Module augmentation cannot introduce new names in the top level scope.


==== tests/cases/compiler/f1.ts (1 errors) ====
    
    declare global {
        interface Something {x}
                  ~~~~~~~~~
!!! error TS2665: Module augmentation cannot introduce new names in the top level scope.
    }
    export {};
==== tests/cases/compiler/f2.ts (1 errors) ====
    
    declare global {
        interface Something {y}
                  ~~~~~~~~~
!!! error TS2665: Module augmentation cannot introduce new names in the top level scope.
    }
    export {};
==== tests/cases/compiler/f3.ts (0 errors) ====
    import "./f1";
    import "./f2";
    
    