==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/specializedSignatureIsNotSubtypeOfNonSpecializedSignature.ts (12 errors) ====
    // Specialized signatures must be a subtype of a non-specialized signature
    // All the below should be errors
    
    function foo(x: 'a');
    ~~~~~~~~~~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
    function foo(x: number) { }
    
    class C {
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: number);
        foo(x: any) { }
    }
    
    class C2<T> {
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: T);
        foo(x: any) { }
    }
    
    class C3<T extends String> {
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: T);
        foo(x: any) { }
    }
    
    interface I {
        (x: 'a');
        ~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        (x: number);
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: number);
    }
    
    interface I2<T> {
        (x: 'a');
        ~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        (x: T);
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: T);
    }
    
    interface I3<T extends String> {
        (x: 'a');
        ~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        (x: T);
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: T);
    }
    
    var a: {
        (x: 'a');
        ~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        (x: number);
        foo(x: 'a');
        ~~~~~~~~~~~~
!!! Specialized overload signature is not assignable to any non-specialized signature.
        foo(x: number);
    }
    
    var a2: {
        (x: 'a');
        <T>(x: T);
        foo(x: 'a');
        foo<T>(x: T);
    }
    
    var a3: {
        (x: 'a');
        <T>(x: T);
        foo(x: 'a');
        foo<T extends String>(x: T);
    }