=== tests/cases/compiler/contextualTyping16.ts ===
var foo: {id:number;} = {id:4}; foo = {id:5};
>foo : { id: number; }
>id : number
>{id:4} : { id: number; }
>id : number
>foo = {id:5} : { id: number; }
>foo : { id: number; }
>{id:5} : { id: number; }
>id : number