==== tests/cases/compiler/addMoreOverloadsToBaseSignature.ts (1 errors) ====
    interface Foo {
        f(): string;
    }
    
    interface Bar extends Foo {
              ~~~
!!! addMoreOverloadsToBaseSignature.ts(5,11): error TS2143: Interface 'Bar' cannot extend interface 'Foo':
!!! 	Types of property 'f' of types 'Bar' and 'Foo' are incompatible:
!!! 		Call signatures of types '(key: string) => string' and '() => string' are incompatible:
!!! 			Call signature expects 0 or fewer parameters.
        f(key: string): string;
    }
    