=== tests/cases/compiler/downlevelLetConst15.ts ===
'use strict'
declare function use(a: any);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 1, 21))

var x = 10;
>x : Symbol(x, Decl(downlevelLetConst15.ts, 3, 3))

var z0, z1, z2, z3;
>z0 : Symbol(z0, Decl(downlevelLetConst15.ts, 4, 3))
>z1 : Symbol(z1, Decl(downlevelLetConst15.ts, 4, 7))
>z2 : Symbol(z2, Decl(downlevelLetConst15.ts, 4, 11))
>z3 : Symbol(z3, Decl(downlevelLetConst15.ts, 4, 15))
{
    const x = 20;
>x : Symbol(x, Decl(downlevelLetConst15.ts, 6, 9))

    use(x);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>x : Symbol(x, Decl(downlevelLetConst15.ts, 6, 9))

    const [z0] = [1];
>z0 : Symbol(z0, Decl(downlevelLetConst15.ts, 9, 11))

    use(z0);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z0 : Symbol(z0, Decl(downlevelLetConst15.ts, 9, 11))

    const [{a: z1}] = [{a: 1}]
>z1 : Symbol(z1, Decl(downlevelLetConst15.ts, 11, 12))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 11, 24))

    use(z1);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z1 : Symbol(z1, Decl(downlevelLetConst15.ts, 11, 12))

    const {a: z2} = { a: 1 };
>z2 : Symbol(z2, Decl(downlevelLetConst15.ts, 13, 11))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 13, 21))

    use(z2);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z2 : Symbol(z2, Decl(downlevelLetConst15.ts, 13, 11))

    const {a: {b: z3}} = { a: {b: 1} };
>z3 : Symbol(z3, Decl(downlevelLetConst15.ts, 15, 15))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 15, 26))
>b : Symbol(b, Decl(downlevelLetConst15.ts, 15, 31))

    use(z3);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z3 : Symbol(z3, Decl(downlevelLetConst15.ts, 15, 15))
}
use(x);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>x : Symbol(x, Decl(downlevelLetConst15.ts, 3, 3))

use(z0);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z0 : Symbol(z0, Decl(downlevelLetConst15.ts, 4, 3))

use(z1);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z1 : Symbol(z1, Decl(downlevelLetConst15.ts, 4, 7))

use(z2);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z2 : Symbol(z2, Decl(downlevelLetConst15.ts, 4, 11))

use(z3);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z3 : Symbol(z3, Decl(downlevelLetConst15.ts, 4, 15))

var z6;
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 23, 3))

var y = true;
>y : Symbol(y, Decl(downlevelLetConst15.ts, 24, 3))
{
    const y = "";
>y : Symbol(y, Decl(downlevelLetConst15.ts, 26, 9))

    const [z6] = [true]
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 27, 11))
    {
        const y = 1;
>y : Symbol(y, Decl(downlevelLetConst15.ts, 29, 13))

        const {a: z6} = { a: 1 }
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 30, 15))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 30, 25))

        use(y);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>y : Symbol(y, Decl(downlevelLetConst15.ts, 29, 13))

        use(z6);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 30, 15))
    }
    use(y);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>y : Symbol(y, Decl(downlevelLetConst15.ts, 26, 9))

    use(z6);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 27, 11))
}
use(y);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>y : Symbol(y, Decl(downlevelLetConst15.ts, 24, 3))

use(z6);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z6 : Symbol(z6, Decl(downlevelLetConst15.ts, 23, 3))

var z = false;
>z : Symbol(z, Decl(downlevelLetConst15.ts, 40, 3))

var z5 = 1;
>z5 : Symbol(z5, Decl(downlevelLetConst15.ts, 41, 3))
{
    const z = "";
>z : Symbol(z, Decl(downlevelLetConst15.ts, 43, 9))

    const [z5] = [5];
>z5 : Symbol(z5, Decl(downlevelLetConst15.ts, 44, 11))
    {
        const _z = 1;
>_z : Symbol(_z, Decl(downlevelLetConst15.ts, 46, 13))

        const {a: _z5} = { a: 1 };
>_z5 : Symbol(_z5, Decl(downlevelLetConst15.ts, 47, 15))
>a : Symbol(a, Decl(downlevelLetConst15.ts, 47, 26))

        // try to step on generated name
        use(_z);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>_z : Symbol(_z, Decl(downlevelLetConst15.ts, 46, 13))
    }
    use(z);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>z : Symbol(z, Decl(downlevelLetConst15.ts, 43, 9))
}
use(y);
>use : Symbol(use, Decl(downlevelLetConst15.ts, 0, 12))
>y : Symbol(y, Decl(downlevelLetConst15.ts, 24, 3))