==== tests/cases/compiler/cloduleSplitAcrossFiles_class.ts (0 errors) ====
    class D { }
    
==== tests/cases/compiler/cloduleSplitAcrossFiles_module.ts (1 errors) ====
    module D {
           ~
!!! cloduleSplitAcrossFiles_module.ts(1,8): error TS2188: Module 'D' cannot merge with previous declaration of 'D' in a different file 'cloduleSplitAcrossFiles_class.ts'.
        export var y = "hi";
    }
    D.y;