[INFO] cloning repository https://github.com/g610g/ray-diz
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/g610g/ray-diz" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Fray-diz", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Fray-diz'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6817eb69b9a02f5fd410217fb9a05ddb80313eaa
[INFO] checking g610g/ray-diz against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fg610g%2Fray-diz" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/g610g/ray-diz on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/g610g/ray-diz
[INFO] finished tweaking git repo https://github.com/g610g/ray-diz
[INFO] tweaked toml for git repo https://github.com/g610g/ray-diz written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/g610g/ray-diz already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ff8240b6c3d860e010ad7e527c9a2e4e5275a2841974cad0f581973b9d6d2f4
[INFO] running `Command { std: "docker" "start" "-a" "6ff8240b6c3d860e010ad7e527c9a2e4e5275a2841974cad0f581973b9d6d2f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ff8240b6c3d860e010ad7e527c9a2e4e5275a2841974cad0f581973b9d6d2f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ff8240b6c3d860e010ad7e527c9a2e4e5275a2841974cad0f581973b9d6d2f4", kill_on_drop: false }`
[INFO] [stdout] 6ff8240b6c3d860e010ad7e527c9a2e4e5275a2841974cad0f581973b9d6d2f4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d6c54e0191b7089846fbfc2ea1e262edc961e52bda9e9dc374a65998d6e9217
[INFO] running `Command { std: "docker" "start" "-a" "7d6c54e0191b7089846fbfc2ea1e262edc961e52bda9e9dc374a65998d6e9217", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.83
[INFO] [stderr]    Compiling serde v1.0.202
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]    Compiling unicode-segmentation v1.11.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking regex-syntax v0.8.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking bytes v1.6.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.5.7
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[INFO] [stderr]     Checking parking_lot v0.12.2
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]     Checking log v0.4.21
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[INFO] [stderr]     Checking clap v2.34.0
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[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.65
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking atoi v0.3.3
[INFO] [stderr]     Checking regex-automata v0.4.6
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[INFO] [stderr]     Checking tracing-serde v0.1.3
[INFO] [stderr]     Checking serde_json v1.0.117
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling pin-project-internal v1.1.5
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]     Checking async-stream v0.3.5
[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking pin-project v1.1.5
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking tracing-futures v0.2.5
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[INFO] [stderr]     Checking tokio-stream v0.1.15
[INFO] [stderr]     Checking mini-redis v0.4.1
[INFO] [stderr]     Checking redis-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/connection.rs:48:28
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Frame::Integer(val) => {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/connection.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 let len = val.len();
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `val`
[INFO] [stdout]   --> src/connection.rs:48:28
[INFO] [stdout]    |
[INFO] [stdout] 48 |             Frame::Integer(val) => {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_val`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/connection.rs:55:21
[INFO] [stdout]    |
[INFO] [stdout] 55 |                 let len = val.len();
[INFO] [stdout]    |                     ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Connection` is never constructed
[INFO] [stdout]   --> src/connection.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Connection {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `read_frame`, `write_frame`, and `parse_frame` are never used
[INFO] [stdout]   --> src/connection.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Connection {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(stream: TcpStream) -> Connection {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub async fn read_frame(&mut self) -> Result<Option<Frame>> {
[INFO] [stdout]    |                  ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub async fn write_frame(&mut self, frame: &Frame) -> io::Result<()> {
[INFO] [stdout]    |                  ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn parse_frame(&mut self) -> Result<Option<Frame>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Connection` is never constructed
[INFO] [stdout]   --> src/connection.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Connection {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `read_frame`, `write_frame`, and `parse_frame` are never used
[INFO] [stdout]   --> src/connection.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl Connection {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |     pub fn new(stream: TcpStream) -> Connection {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |     pub async fn read_frame(&mut self) -> Result<Option<Frame>> {
[INFO] [stdout]    |                  ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 36 |     pub async fn write_frame(&mut self, frame: &Frame) -> io::Result<()> {
[INFO] [stdout]    |                  ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn parse_frame(&mut self) -> Result<Option<Frame>> {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/connection.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         self.stream.flush().await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let _ = self.stream.flush().await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/connection.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |         self.stream.flush().await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 62 |         let _ = self.stream.flush().await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `dashmap::mapref::one`
[INFO] [stdout]  --> src/bin/client.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use dashmap::mapref::one;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> src/bin/server.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mini_redis::{Connection, Frame, Result};
[INFO] [stdout]   |                                     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/bin/server.rs:7:25
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::sync::mpsc::{self, Sender};
[INFO] [stdout]   |                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `self` and `task`
[INFO] [stdout]  --> src/bin/my_tokio.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     future::{self, Future},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout] 4 |     pin::Pin,
[INFO] [stdout] 5 |     task,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/bin/echo-server.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let value: i32 = gives_default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyTokio` is never constructed
[INFO] [stdout]  --> src/bin/my_tokio.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct MyTokio {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Task` is never used
[INFO] [stdout]   --> src/bin/my_tokio.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type Task = Pin<Box<dyn Future<Output = ()> + Send>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `spawn` are never used
[INFO] [stdout]   --> src/bin/my_tokio.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl MyTokio {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 14 |     fn new() -> MyTokio {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn spawn<F>(&mut self, future: F)
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `self` and `task`
[INFO] [stdout]  --> src/bin/my_tokio.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     future::{self, Future},
[INFO] [stdout]   |              ^^^^
[INFO] [stdout] 4 |     pin::Pin,
[INFO] [stdout] 5 |     task,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MyTokio` is never constructed
[INFO] [stdout]  --> src/bin/my_tokio.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct MyTokio {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Task` is never used
[INFO] [stdout]   --> src/bin/my_tokio.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | type Task = Pin<Box<dyn Future<Output = ()> + Send>>;
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `spawn` are never used
[INFO] [stdout]   --> src/bin/my_tokio.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl MyTokio {
[INFO] [stdout]    | ------------ associated items in this implementation
[INFO] [stdout] 14 |     fn new() -> MyTokio {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 19 |     fn spawn<F>(&mut self, future: F)
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Result`
[INFO] [stdout]  --> src/bin/server.rs:3:37
[INFO] [stdout]   |
[INFO] [stdout] 3 | use mini_redis::{Connection, Frame, Result};
[INFO] [stdout]   |                                     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]  --> src/bin/server.rs:7:25
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::sync::mpsc::{self, Sender};
[INFO] [stdout]   |                         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `dashmap::mapref::one`
[INFO] [stdout]  --> src/bin/client.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use dashmap::mapref::one;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `one_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | async fn one_second() {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `five_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | async fn five_second() {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | async fn two_second() {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait_and_print` is never used
[INFO] [stdout]   --> src/bin/server.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 | async fn wait_and_print() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_concurrency` is never used
[INFO] [stdout]   --> src/bin/server.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 | async fn test_concurrency(tx: Sender<String>) {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait` is never used
[INFO] [stdout]   --> src/bin/server.rs:97:10
[INFO] [stdout]    |
[INFO] [stdout] 97 | async fn wait() {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         tx.send("Five Seconds".to_string()).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let _ = tx.send("Five Seconds".to_string()).await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         tx2.send("Two Seconds".to_string()).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let _ = tx2.send("Two Seconds".to_string()).await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         task.await;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let _ = task.await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/bin/echo-server.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let value: i32 = gives_default();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Get` is never constructed
[INFO] [stdout]  --> src/bin/client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Command {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 8 |     Get {
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Command` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Get` is never constructed
[INFO] [stdout]  --> src/bin/client.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Command {
[INFO] [stdout]   |      ------- variant in this enum
[INFO] [stdout] 8 |     Get {
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Command` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `one_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 | async fn one_second() {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `five_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:19:10
[INFO] [stdout]    |
[INFO] [stdout] 19 | async fn five_second() {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `two_second` is never used
[INFO] [stdout]   --> src/bin/server.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | async fn two_second() {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait_and_print` is never used
[INFO] [stdout]   --> src/bin/server.rs:27:10
[INFO] [stdout]    |
[INFO] [stdout] 27 | async fn wait_and_print() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_concurrency` is never used
[INFO] [stdout]   --> src/bin/server.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 31 | async fn test_concurrency(tx: Sender<String>) {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `wait` is never used
[INFO] [stdout]   --> src/bin/server.rs:97:10
[INFO] [stdout]    |
[INFO] [stdout] 97 | async fn wait() {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         tx.send("Five Seconds".to_string()).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let _ = tx.send("Five Seconds".to_string()).await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         tx2.send("Two Seconds".to_string()).await;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let _ = tx2.send("Two Seconds".to_string()).await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/server.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         task.await;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 51 |         let _ = task.await;
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.81s
[INFO] running `Command { std: "docker" "inspect" "7d6c54e0191b7089846fbfc2ea1e262edc961e52bda9e9dc374a65998d6e9217", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d6c54e0191b7089846fbfc2ea1e262edc961e52bda9e9dc374a65998d6e9217", kill_on_drop: false }`
[INFO] [stdout] 7d6c54e0191b7089846fbfc2ea1e262edc961e52bda9e9dc374a65998d6e9217