error TS5055: Cannot write file 'tests/cases/compiler/b.d.ts' 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 TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
  Use 'outFile' instead.


!!! error TS5055: Cannot write file 'tests/cases/compiler/b.d.ts' 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.
!!! error TS5101: Option 'out' is deprecated and will stop functioning in TypeScript 5.5. Specify compilerOption '"ignoreDeprecations": "5.0"' to silence this error.
!!! error TS5101:   Use 'outFile' instead.
==== tests/cases/compiler/a.ts (0 errors) ====
    class c {
    }
    
==== tests/cases/compiler/b.d.ts (0 errors) ====
    declare function foo(): boolean;
    