error TS5055: Cannot write file 'tests/cases/compiler/a.js' because it would overwrite input file.
  Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.


!!! error TS5055: Cannot write file 'tests/cases/compiler/a.js' because it would overwrite input file.
!!! error TS5055:   Adding a tsconfig.json file will help organize projects that contain both TypeScript and JavaScript files. Learn more at https://aka.ms/tsconfig.
==== tests/cases/compiler/a.js (0 errors) ====
    /**
      * @type {number}
      * @type {string}
      */
    var v;
    