tests/cases/compiler/functionOverloads20.ts(1,10): error TS2394: Overload signature is not compatible with function implementation. ==== tests/cases/compiler/functionOverloads20.ts (1 errors) ==== function foo(bar:{a:number;}): number; ~~~ !!! error TS2394: Overload signature is not compatible with function implementation. function foo(bar:{a:string;}): string; function foo(bar:{a:any;}): string {return ""}