==== tests/cases/compiler/objectTypesIdentityWithCallSignaturesWithOverloads.ts (8 errors) ====
    // object types are identical structurally
    
    class A {
        foo(x: number): number;
        foo(x: string): string;
        foo(x: any): any { return null; }
    }
    
    class B {
        foo(x: number): number;
        foo(x: string): string;
        foo(x: any): any { return null; }
    }
    
    class C<T> {
        foo(x: number): number;
        foo(x: string): string;
        foo(x: T): T;
        foo(x: any): any { return null; }
    }
    
    interface I {
        foo(x: number): number;
        foo(x: string): string;    
    }
    
    interface I2<T> {
        foo(x: number): number;
        foo(x: string): string;
        foo(x: T): T;
    }
    
    var a: {
        foo(x: number): number
        foo(x: string): string
    }
    
    var b = {
        foo(x: any) { return <any>''; }
    };
    
    function foo1(x: A);
    function foo1(x: A); // error
    ~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(43,1): error TS2144: Duplicate overload signature for 'foo1'.
    function foo1(x: any) { }
    
    function foo1b(x: B);
    function foo1b(x: B); // error
    ~~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(47,1): error TS2144: Duplicate overload signature for 'foo1b'.
    function foo1b(x: any) { }
    
    function foo1c(x: C<string>);
    function foo1c(x: C<string>); // error
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(51,1): error TS2144: Duplicate overload signature for 'foo1c'.
    function foo1c(x: any) { }
    
    function foo2(x: I);
    function foo2(x: I); // error
    ~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(55,1): error TS2144: Duplicate overload signature for 'foo2'.
    function foo2(x: any) { }
    
    function foo3(x: typeof a);
    function foo3(x: typeof a); // error
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(59,1): error TS2144: Duplicate overload signature for 'foo3'.
    function foo3(x: any) { }
    
    function foo4(x: typeof b);
    function foo4(x: typeof b); // error
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(63,1): error TS2144: Duplicate overload signature for 'foo4'.
    function foo4(x: any) { }
    
    function foo5(x: A);
    function foo5(x: B); // error
    ~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(67,1): error TS2144: Duplicate overload signature for 'foo5'.
    function foo5(x: any) { }
    
    function foo5b(x: A);
    function foo5b(x: C<string>); // ok
    function foo5b(x: any) { }
    
    function foo6(x: A);
    function foo6(x: I); // BUG 831930
    function foo6(x: any) { }
    
    function foo7(x: A);
    function foo7(x: typeof a); // BUG 831930
    function foo7(x: any) { }
    
    function foo8(x: B);
    function foo8(x: I); // BUG 831930
    function foo8(x: any) { }
    
    function foo9(x: B);
    function foo9(x: C<string>); // ok
    function foo9(x: any) { }
    
    function foo10(x: B);
    function foo10(x: typeof a); // BUG 831930
    function foo10(x: any) { }
    
    function foo11(x: B);
    function foo11(x: typeof b); // ok
    function foo11(x: any) { }
    
    function foo12(x: I);
    function foo12(x: C<string>); // ok
    function foo12(x: any) { }
    
    function foo12b(x: I2<string>);
    function foo12b(x: C<string>); // ok
    function foo12b(x: any) { }
    
    function foo13(x: I);
    function foo13(x: typeof a);  // error
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
!!! objectTypesIdentityWithCallSignaturesWithOverloads.ts(107,1): error TS2144: Duplicate overload signature for 'foo13'.
    function foo13(x: any) { }
    
    function foo14(x: I);
    function foo14(x: typeof b); // ok
    function foo14(x: any) { }
    
    function foo15(x: I2<string>);
    function foo15(x: C<number>); // ok
    function foo15(x: any) { }