error: this loop never actually loops
    --> src/main.rs:2933:18
     |
2933 |           let ok = loop {
     |  __________________^
2934 | |             unsafe {
2935 | |                 let xcon = match Connection::connect(Some(":1.0")) {
2936 | |                     Ok((xcon, _)) => xcon,
...    |
2978 | |             break true;
2979 | |         };
     | |_________^
     |
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#never_loop
     = note: `#[deny(clippy::never_loop)]` on by default

error: spawned process is never `wait()`ed on
    --> src/main.rs:2923:23
     |
2923 |         let mut cmd = Command::new("Xvfb").arg(":1").spawn().unwrap();
     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     |
     = note: consider calling `.wait()`
     = note: not doing so might leave behind zombie processes
     = note: see https://doc.rust-lang.org/stable/std/process/struct.Child.html#warning
     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#zombie_processes
     = note: `-D clippy::zombie-processes` implied by `-D warnings`
     = help: to override `-D warnings` add `#[allow(clippy::zombie_processes)]`