=== tests/cases/compiler/downlevelLetConst19.ts ===
'use strict'
>'use strict' : string

declare function use(a: any);
>use : (a: any) => any
>a : any

var x;
>x : any

function a() {
>a : () => void
  {
    let x;
>x : any

    use(x);
>use(x) : any
>use : (a: any) => any
>x : any

    function b() {
>b : () => void
        {
            let x;
>x : any

            use(x);
>use(x) : any
>use : (a: any) => any
>x : any
        }
        use(x);
>use(x) : any
>use : (a: any) => any
>x : any
    }
  }
  use(x)
>use(x) : any
>use : (a: any) => any
>x : any
}
use(x)
>use(x) : any
>use : (a: any) => any
>x : any