==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/multipleStringIndexers.ts (6 errors) ====
    // Multiple indexers of the same type are an error
    
    class C {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    }
    
    interface I {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    }
    
    var a: {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    }
    
    var b: {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    } = { y: '' }
    
    class C2<T> {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    }
    
    interface I2<T> {
        [x: string]: string;
        [x: string]: string;
        ~~~~~~~~~~~~~~~~~~~~
!!! Duplicate string index signature.
    }