==== tests/cases/compiler/typeMatch2.ts (6 errors) ====
    function f1() {
    	var a = { x: 1, y: 2 };
    	a = {}; // error
    	~
!!! Type '{}' is not assignable to type '{ x: number; y: number; }':
!!!   Property 'x' is missing in type '{}'.
        a = { x: 1 }; // error
        ~
!!! Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }':
!!!   Property 'y' is missing in type '{ x: number; }'.
    	a = { x: 1, y: 2, z: 3 };
        a = { x: 1, z: 3 };  // error
        ~
!!! Type '{ x: number; z: number; }' is not assignable to type '{ x: number; y: number; }':
!!!   Property 'y' is missing in type '{ x: number; z: number; }'.
    }
    
    class Animal { private a; }
    class Giraffe extends Animal { private g; }
    
    function f2() {
        var a = new Animal();
        var g = new Giraffe();
        var aa = [ a, a, a ];
        var gg = [ g, g, g ];
        aa = gg;
        gg = aa; // error
        ~~
!!! Type 'Animal[]' is not assignable to type 'Giraffe[]':
!!!   Type 'Animal' is not assignable to type 'Giraffe':
!!!     Property 'g' is missing in type 'Animal'.
        var xa = { f1: 5, f2: aa };
        var xb = { f1: 5, f2: gg };
        xa = xb; // Should be ok
        xb = xa; // Not ok
        ~~
!!! Type '{ f1: number; f2: Animal[]; }' is not assignable to type '{ f1: number; f2: Giraffe[]; }':
!!!   Types of property 'f2' are incompatible:
!!!     Type 'Animal[]' is not assignable to type 'Giraffe[]':
!!!       Type 'Animal' is not assignable to type 'Giraffe'.
    }
    
    function f4() {
        var _any: any = 0;
        var i = 5;
        i = null; 
        i = undefined;
        var a = { x: 1, y: 1 };
        a = { x: 1, y: null }; 
        a = { x: 1, y: undefined }; 
        a = { x: 1, y: _any }; 
        a = { x: 1, y: _any, z:1 }; 
        a = { x: 1 }; // error
        ~
!!! Type '{ x: number; }' is not assignable to type '{ x: number; y: number; }':
!!!   Property 'y' is missing in type '{ x: number; }'.
        var mf = function m(n) { return false; };
        var zf = function z(n: number) { return true; };
        mf=zf;
        mf(_any);
        zf(_any);
    }