=== tests/cases/conformance/generators/generatorReturnTypeFallback.5.ts ===
// Allow generators to fallback to IterableIterator if they do not need a type for the sent value while in strictNullChecks mode.
function* f(): IterableIterator<number> {
>f : () => IterableIterator<number>

    yield 1;
>yield 1 : undefined
>1 : 1
}