=== tests/cases/conformance/es6/yieldExpressions/generatorTypeCheck30.ts ===
function* g2(): Iterator<Iterable<(x: string) => number>> {
>g2 : Symbol(g2, Decl(generatorTypeCheck30.ts, 0, 0))
>Iterator : Symbol(Iterator, Decl(lib.d.ts, 1675, 1))
>Iterable : Symbol(Iterable, Decl(lib.d.ts, 1681, 1))
>x : Symbol(x, Decl(generatorTypeCheck30.ts, 0, 35))

    yield function* () {
        yield x => x.length;
>x : Symbol(x, Decl(generatorTypeCheck30.ts, 2, 13))
>x : Symbol(x, Decl(generatorTypeCheck30.ts, 2, 13))

    } ()
}