==== tests/cases/compiler/overload1.ts (6 errors) ====
    module O {
        export class A {
            
        }
    
        export class B extends A {
        }
    
        export class C extends B {
            
        }
    
        export interface I {
            f(s:string):number;
            f(n:number):string;
            g(n1:number,n2:number):number;
            g(n:number):string;
            g(a:A):C;
            g(c:C):string;
            h(s1:string,s2:number):string;
            h(s1:number,s2:string):number;
        }
    }
    
    declare var x:O.I;
    
    var e:string=x.g(new O.A()); // matches overload but bad assignment
        ~
!!! Type 'C' is not assignable to type 'string'.
    var y:string=x.f(3); // good
    y=x.f("nope"); // can't assign number to string
    ~
!!! Type 'number' is not assignable to type 'string'.
    var z:string=x.g(x.g(3,3)); // good
    z=x.g(2,2,2); // no match
      ~~~~~~~~~~
!!! Supplied parameters do not match any signature of call target.
    z=x.g(); // no match
      ~~~~~
!!! Supplied parameters do not match any signature of call target.
    z=x.g(new O.B()); // ambiguous (up and down conversion)
    ~
!!! Type 'C' is not assignable to type 'string'.
    z=x.h(2,2); // no match
            ~
!!! Argument of type 'number' is not assignable to parameter of type 'string'.
    z=x.h("hello",0); // good
    
    var v=x.g;