Function divide_and_conquer_seq

src/scope.rs:1299–1307

(counter: &AtomicUsize, size: usize)

    }

    /// Tests that blocking functions like `join` can be nested within scopes.
    #[test]
    fn scope_concurrency() {
        const NUM_JOBS: u8 = 128;

        static THREAD_POOL: ThreadPool = ThreadPool::new();
        THREAD_POOL.resize_to_available();

        let a = AtomicU8::new(0);
        let b = AtomicU8::new(0);

        THREAD_POOL.with_worker(|_: &Worker| {