[INFO] cloning repository https://github.com/MaxF12/AnyEyeballs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MaxF12/AnyEyeballs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaxF12%2FAnyEyeballs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaxF12%2FAnyEyeballs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0743cfda53955d131bf18e5ed86cd9123a796c68
[INFO] checking MaxF12/AnyEyeballs against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMaxF12%2FAnyEyeballs" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MaxF12/AnyEyeballs on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MaxF12/AnyEyeballs
[INFO] finished tweaking git repo https://github.com/MaxF12/AnyEyeballs
[INFO] tweaked toml for git repo https://github.com/MaxF12/AnyEyeballs written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/MaxF12/AnyEyeballs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d31cd7570194e7fb36bd55b4e437db9ef12179f4d2108b7010af3cac2f0e0478
[INFO] running `Command { std: "docker" "start" "-a" "d31cd7570194e7fb36bd55b4e437db9ef12179f4d2108b7010af3cac2f0e0478", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d31cd7570194e7fb36bd55b4e437db9ef12179f4d2108b7010af3cac2f0e0478", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d31cd7570194e7fb36bd55b4e437db9ef12179f4d2108b7010af3cac2f0e0478", kill_on_drop: false }`
[INFO] [stdout] d31cd7570194e7fb36bd55b4e437db9ef12179f4d2108b7010af3cac2f0e0478
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c0e1c248df6cd762e7d903078a5447d91b253740509276b7c2801bdb3c4e227
[INFO] running `Command { std: "docker" "start" "-a" "1c0e1c248df6cd762e7d903078a5447d91b253740509276b7c2801bdb3c4e227", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.88
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking anyeyeballs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `IpAddr`, `TcpListener`
[INFO] [stdout]  --> src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{TcpListener, Ipv4Addr, Ipv6Addr, UdpSocket, IpAddr, Shutdown};
[INFO] [stdout]   |                ^^^^^^^^^^^                                 ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `IpAddr`, `TcpListener`
[INFO] [stdout]  --> src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{TcpListener, Ipv4Addr, Ipv6Addr, UdpSocket, IpAddr, Shutdown};
[INFO] [stdout]   |                ^^^^^^^^^^^                                 ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:26
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                          ----^^^^^^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:68
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                                                                    ----^^^^^^
[INFO] [stdout]     |                                                                    |
[INFO] [stdout]     |                                                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:97
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                                                                                                 ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                                                                 |
[INFO] [stdout]     |                                                                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:139
[INFO] [stdout]     |
[INFO] [stdout] 264 | ...omicBool>, mut available_workers: Arc<Mutex<usize>>, mut active_workers: Arc<Mutex<usize>>, pool: Arc<Mutex<ThreadPool>>) {
[INFO] [stdout]     |                                                         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                         |
[INFO] [stdout]     |                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 |             socket.set_nonblocking(true);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             socket.set_nonblocking(true);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |         self.listener.lock().unwrap().as_ref().unwrap().shutdown(Shutdown::Both);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:308:5
[INFO] [stdout]     |
[INFO] [stdout] 308 |     stream.set_nonblocking(false);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         stream.shutdown(Shutdown::Both);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:324:5
[INFO] [stdout]     |
[INFO] [stdout] 324 |     stream.shutdown(Shutdown::Both);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:26
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                          ----^^^^^^^^
[INFO] [stdout]     |                          |
[INFO] [stdout]     |                          help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:68
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                                                                    ----^^^^^^
[INFO] [stdout]     |                                                                    |
[INFO] [stdout]     |                                                                    help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:97
[INFO] [stdout]     |
[INFO] [stdout] 264 | pub fn serve_connections(mut incoming: Arc<Mutex<Option<Socket>>>, mut active: Arc<AtomicBool>, mut available_workers: Arc<Mutex<usize>>,...
[INFO] [stdout]     |                                                                                                 ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                                                                 |
[INFO] [stdout]     |                                                                                                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:139
[INFO] [stdout]     |
[INFO] [stdout] 264 | ...omicBool>, mut available_workers: Arc<Mutex<usize>>, mut active_workers: Arc<Mutex<usize>>, pool: Arc<Mutex<ThreadPool>>) {
[INFO] [stdout]     |                                                         ----^^^^^^^^^^^^^^
[INFO] [stdout]     |                                                         |
[INFO] [stdout]     |                                                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:137:13
[INFO] [stdout]     |
[INFO] [stdout] 137 |             socket.set_nonblocking(true);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:157:13
[INFO] [stdout]     |
[INFO] [stdout] 157 |             socket.set_nonblocking(true);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:165:9
[INFO] [stdout]     |
[INFO] [stdout] 165 |         self.listener.lock().unwrap().as_ref().unwrap().shutdown(Shutdown::Both);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:308:5
[INFO] [stdout]     |
[INFO] [stdout] 308 |     stream.set_nonblocking(false);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |         stream.shutdown(Shutdown::Both);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:324:5
[INFO] [stdout]     |
[INFO] [stdout] 324 |     stream.shutdown(Shutdown::Both);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server_v4`
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let server_v4 = thread::spawn(move ||
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_v4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server_v6`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let server_v6 = thread::spawn(move ||
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_v6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `orch_thread`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let orch_thread = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orch_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut available_workers =  Arc::new(Mutex::new(WORKERS));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut active_workers_v4 = Arc::new(Mutex::new(0));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut active_workers_v6 = Arc::new(Mutex::new(0));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server_v4`
[INFO] [stdout]   --> src/main.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let server_v4 = thread::spawn(move ||
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_v4`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server_v6`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let server_v6 = thread::spawn(move ||
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_v6`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `orch_thread`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let orch_thread = thread::spawn(move || {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_orch_thread`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut available_workers =  Arc::new(Mutex::new(WORKERS));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut active_workers_v4 = Arc::new(Mutex::new(0));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let mut active_workers_v6 = Arc::new(Mutex::new(0));
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     node.send_join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 | ...   node.send_status((WORKERS) as u8, (active_workers_v4) as u8, (active_workers_v6) as u8, active_v4.load(SeqCst), active_v6.load(SeqCst));
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:33:5
[INFO] [stdout]    |
[INFO] [stdout] 33 |     node.send_join();
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 | ...   node.send_status((WORKERS) as u8, (active_workers_v4) as u8, (active_workers_v6) as u8, active_v4.load(SeqCst), active_v6.load(SeqCst));
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.23s
[INFO] running `Command { std: "docker" "inspect" "1c0e1c248df6cd762e7d903078a5447d91b253740509276b7c2801bdb3c4e227", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c0e1c248df6cd762e7d903078a5447d91b253740509276b7c2801bdb3c4e227", kill_on_drop: false }`
[INFO] [stdout] 1c0e1c248df6cd762e7d903078a5447d91b253740509276b7c2801bdb3c4e227