==== tests/cases/compiler/augmentedTypesInterface.ts (2 errors) ====
    // interface then interface
    
    interface i {
        foo(): void;
    }
    
    interface i {
        bar(): number;
    }
    
    // interface then class
    interface i2 {
        foo(): void;
    }
    
    class i2 {  // error
          ~~
!!! Duplicate identifier 'i2'.
        bar() {
            return 1;
        }
    }
    
    // interface then enum
    interface i3 {
        foo(): void;
    }
    enum i3 { One }; // error
         ~~
!!! Duplicate identifier 'i3'.
    
    // interface then import
    interface i4 {
        foo(): void;
    }
    
    //import i4 = require('');  // error