error TS6082: Only 'amd' and 'system' modules are supported alongside --outFile.


!!! error TS6082: Only 'amd' and 'system' modules are supported alongside --outFile.
==== tests/cases/compiler/ref/a.ts (0 errors) ====
    // This should error
    
    export class A { }
    
==== tests/cases/compiler/b.ts (0 errors) ====
    import {A} from "./ref/a";
    export class B extends A { }