error TS6054: File 'tests/cases/compiler/b.js' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.
error TS6054: File 'tests/cases/compiler/b.js.map' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.


!!! error TS6054: File 'tests/cases/compiler/b.js' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.
!!! error TS6054: File 'tests/cases/compiler/b.js.map' has unsupported extension. The only supported extensions are '.ts', '.tsx', '.d.ts'.
==== tests/cases/compiler/a.ts (0 errors) ====
    class c {
    }
    
==== tests/cases/compiler/b.js.map (0 errors) ====
    function foo() {
    }
    
==== tests/cases/compiler/b.js (0 errors) ====
    function bar() {
    }