=== tests/cases/conformance/es6/Symbols/symbolType18.ts ===
interface Foo { prop }
>Foo : Symbol(Foo, Decl(symbolType18.ts, 0, 0))
>prop : Symbol(prop, Decl(symbolType18.ts, 0, 15))

var x: symbol | Foo;
>x : Symbol(x, Decl(symbolType18.ts, 1, 3))
>Foo : Symbol(Foo, Decl(symbolType18.ts, 0, 0))

x;
>x : Symbol(x, Decl(symbolType18.ts, 1, 3))

if (typeof x === "object") {
>x : Symbol(x, Decl(symbolType18.ts, 1, 3))

    x;
>x : Symbol(x, Decl(symbolType18.ts, 1, 3))
}
else {
    x;
>x : Symbol(x, Decl(symbolType18.ts, 1, 3))
}