=== tests/cases/compiler/a.js ===
function foo(a, b) {
>foo : Symbol(foo, Decl(a.js, 0, 0))
>a : Symbol(a, Decl(a.js, 0, 13))
>b : Symbol(b, Decl(a.js, 0, 15))

    switch (a) {
>a : Symbol(a, Decl(a.js, 0, 13))

        case 10:
            if (b) {
>b : Symbol(b, Decl(a.js, 0, 15))

                return b;
>b : Symbol(b, Decl(a.js, 0, 15))
            }
        case 20:
            return a;
>a : Symbol(a, Decl(a.js, 0, 13))
    }
}

function bar() {
>bar : Symbol(bar, Decl(a.js, 9, 1))

    return x;
>x : Symbol(x, Decl(a.js, 15, 7))

    function bar2() {
>bar2 : Symbol(bar2, Decl(a.js, 12, 13))
    }
    var x = 10; // error
>x : Symbol(x, Decl(a.js, 15, 7))
}

label1:  var x2 = 10;
>x2 : Symbol(x2, Decl(a.js, 18, 12))

