=== tests/cases/conformance/es6/yieldExpressions/generatorTypeCheck26.ts ===
function* g(): IterableIterator<(x: string) => number> {
>g : Symbol(g, Decl(generatorTypeCheck26.ts, 0, 0))
>IterableIterator : Symbol(IterableIterator, Decl(lib.d.ts, 1685, 1))
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 0, 33))

    yield x => x.length;
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 1, 9))
>x.length : Symbol(String.length, Decl(lib.d.ts, 414, 19))
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 1, 9))
>length : Symbol(String.length, Decl(lib.d.ts, 414, 19))

    yield *[x => x.length];
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 2, 12))
>x.length : Symbol(String.length, Decl(lib.d.ts, 414, 19))
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 2, 12))
>length : Symbol(String.length, Decl(lib.d.ts, 414, 19))

    return x => x.length;
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 3, 10))
>x : Symbol(x, Decl(generatorTypeCheck26.ts, 3, 10))
}