==== tests/cases/compiler/augmentedTypesFunction.ts (6 errors) ====
    // function then var
    function y1() { }
    var y1 = 1; // error
        ~~
!!! Duplicate identifier 'y1'.
    
    // function then function
    function y2() { }
    function y2() { } // error
    ~~~~~~~~~~~~~~~~~
!!! Duplicate function implementation.
    
    function y2a() { }
    var y2a = () => { } // error
        ~~~
!!! Duplicate identifier 'y2a'.
    
    // function then class
    function y3() { }
    class y3 { } // error
          ~~
!!! Duplicate identifier 'y3'.
    
    function y3a() { }
    class y3a { public foo() { } } // error
          ~~~
!!! Duplicate identifier 'y3a'.
    
    // function then enum
    function y4() { }
    enum y4 { One } // error
         ~~
!!! Duplicate identifier 'y4'.
    
    // function then internal module
    function y5() { }
    module y5 { } // ok since module is not instantiated
    
    function y5a() { }
    module y5a { var y = 2; } // should be an error
    
    function y5b() { }
    module y5b { export var y = 3; } // should be an error
    
    function y5c() { }
    module y5c { export interface I { foo(): void } } // should be an error
    
    // function then import, messes with other errors
    //function y6() { }
    //import y6 = require('');