=== tests/cases/compiler/commaOperator1.ts ===
var v1 = ((1, 2, 3), 4, 5, (6, 7));
>v1 : number
>((1, 2, 3), 4, 5, (6, 7)) : number
>(1, 2, 3), 4, 5, (6, 7) : number
>(1, 2, 3), 4, 5 : number
>(1, 2, 3), 4 : number
>(1, 2, 3) : number
>1, 2, 3 : number
>1, 2 : number
>1 : number
>2 : number
>3 : number
>4 : number
>5 : number
>(6, 7) : number
>6, 7 : number
>6 : number
>7 : number

function f1() {
>f1 : () => number

    var a = 1;
>a : number
>1 : number

    return a, v1, a;
>a, v1, a : number
>a, v1 : number
>a : number
>v1 : number
>a : number
}