=== tests/cases/compiler/global.ts ===
module M {
>M : typeof M

    export function f(y:number) {
>f : (y: number) => number
>y : number

        return x+y;
>x+y : number
>x : number
>y : number
    }
}

var x=10;
>x : number
>10 : number

M.f(3);
>M.f(3) : number
>M.f : (y: number) => number
>M : typeof M
>f : (y: number) => number
>3 : number