[INFO] [stdout] error[E0449]: visibility qualifiers are not permitted here
[INFO] [stdout]    --> src/par_stream.rs:647:16
[INFO] [stdout]     |
[INFO] [stdout] 647 |                   pool.spawn(FnOnce!(move |pool: &P::ThreadPool| {
[INFO] [stdout]     |  ____________________________^
[INFO] [stdout] 648 | |                     let mut process_tasks = tasks.into_iter();
[INFO] [stdout] 649 | |
[INFO] [stdout] 650 | |                     let mut tasks = (0..pool.threads()).map(|_| Vec::new()).collect::<Vec<_>>();
[INFO] [stdout] ...   |
[INFO] [stdout] 719 | |                     }
[INFO] [stdout] 720 | |                 }))
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: trait items always share the visibility of their trait
[INFO] [stdout]     = note: this error originates in the macro `FnOnce` (in Nightly builds, run with -Z macro-backtrace for more info)