[INFO] cloning repository https://github.com/michaelwaves/rust-tutorial
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelwaves/rust-tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelwaves%2Frust-tutorial", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelwaves%2Frust-tutorial'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 79898c55662422959fea3e33d4f3df649258f14d
[INFO] testing michaelwaves/rust-tutorial against 1.98.0-beta.8+cargoflags=--release for beta-release-1.99-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelwaves%2Frust-tutorial" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michaelwaves/rust-tutorial
[INFO] finished tweaking git repo https://github.com/michaelwaves/rust-tutorial
[INFO] tweaked toml for git repo https://github.com/michaelwaves/rust-tutorial written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michaelwaves/rust-tutorial on toolchain 1.98.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.98.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michaelwaves/rust-tutorial 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" "+1.98.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:8683fc1fc2eb5c9ac98e0d076ab094b2ffac7f99da555d2b6a2e27f346de2ec7" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74
[INFO] running `Command { std: "docker" "start" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.172
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let four = IPAddress::V4;
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]  --> src/enums.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let six = IPAddress::V6;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `localhost`
[INFO] [stdout]   --> src/enums.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let localhost = IPAddress::V4(String::from("127.0.0.1"));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_localhost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/enums.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let loopback = IPAddress::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enums.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let some_char = Some('e');
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         V4(String),
[INFO] [stdout]   |         -- ^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -         V4(String),
[INFO] [stdout] 3 +         V4(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |         V6(String),
[INFO] [stdout]   |         -- ^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -         V6(String),
[INFO] [stdout] 4 +         V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enums.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Write(String),
[INFO] [stdout]    |         ----- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -         Write(String),
[INFO] [stdout] 17 +         Write(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enums.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 15 |         Quit,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 16 |         Move { x: i32, y: i32 },
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 17 |         Write(String),
[INFO] [stdout] 18 |         ChangeColor(i32),
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Small`, `Medium`, and `XL` are never constructed
[INFO] [stdout]   --> src/enums.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     enum EggSize {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 36 |         Small,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 37 |         Medium,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 38 |         Large,
[INFO] [stdout] 39 |         XL,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EggSize` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active` and `sign_in_count` are never read
[INFO] [stdout]  --> src/structs.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 3 |         active: bool,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 6 |         sign_in_count: u64,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `width` is never used
[INFO] [stdout]   --> src/structs.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     impl Rectangle {
[INFO] [stdout]    |     -------------- method in this implementation
[INFO] [stdout] 53 |         fn width(&self) -> bool {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 3.99s
[INFO] running `Command { std: "docker" "inspect" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]  --> src/enums.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let four = IPAddress::V4;
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]  --> src/enums.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let six = IPAddress::V6;
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `localhost`
[INFO] [stdout]   --> src/enums.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let localhost = IPAddress::V4(String::from("127.0.0.1"));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_localhost`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/enums.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let loopback = IPAddress::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `some_char`
[INFO] [stdout]   --> src/enums.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let some_char = Some('e');
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |         V4(String),
[INFO] [stdout]   |         -- ^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -         V4(String),
[INFO] [stdout] 3 +         V4(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/enums.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |         V6(String),
[INFO] [stdout]   |         -- ^^^^^^
[INFO] [stdout]   |         |
[INFO] [stdout]   |         field in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -         V6(String),
[INFO] [stdout] 4 +         V6(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/enums.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 |         Write(String),
[INFO] [stdout]    |         ----- ^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 17 -         Write(String),
[INFO] [stdout] 17 +         Write(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]   --> src/enums.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     enum Message {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 15 |         Quit,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 16 |         Move { x: i32, y: i32 },
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 17 |         Write(String),
[INFO] [stdout] 18 |         ChangeColor(i32),
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Small`, `Medium`, and `XL` are never constructed
[INFO] [stdout]   --> src/enums.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 35 |     enum EggSize {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] 36 |         Small,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 37 |         Medium,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 38 |         Large,
[INFO] [stdout] 39 |         XL,
[INFO] [stdout]    |         ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `EggSize` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active` and `sign_in_count` are never read
[INFO] [stdout]  --> src/structs.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 3 |         active: bool,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 6 |         sign_in_count: u64,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `width` is never used
[INFO] [stdout]   --> src/structs.rs:53:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     impl Rectangle {
[INFO] [stdout]    |     -------------- method in this implementation
[INFO] [stdout] 53 |         fn width(&self) -> bool {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74" "/opt/rustwide/cargo-home/bin/cargo" "+1.98.0-beta.8" "test" "--frozen" "--release", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]  --> src/enums.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let four = IPAddress::V4;
[INFO] [stderr]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]  --> src/enums.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let six = IPAddress::V6;
[INFO] [stderr]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `localhost`
[INFO] [stderr]   --> src/enums.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let localhost = IPAddress::V4(String::from("127.0.0.1"));
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_localhost`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `loopback`
[INFO] [stderr]   --> src/enums.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let loopback = IPAddress::V6(String::from("::1"));
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `some_char`
[INFO] [stderr]   --> src/enums.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let some_char = Some('e');
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_some_char`
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/enums.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 |         V4(String),
[INFO] [stderr]   |         -- ^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 3 -         V4(String),
[INFO] [stderr] 3 +         V4(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/enums.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 |         V6(String),
[INFO] [stderr]   |         -- ^^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         field in this variant
[INFO] [stderr]   |
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 4 -         V6(String),
[INFO] [stderr] 4 +         V6(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]   --> src/enums.rs:17:15
[INFO] [stderr]    |
[INFO] [stderr] 17 |         Write(String),
[INFO] [stderr]    |         ----- ^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]    |
[INFO] [stderr] 17 -         Write(String),
[INFO] [stderr] 17 +         Write(()),
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stderr]   --> src/enums.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     enum Message {
[INFO] [stderr]    |          ------- variants in this enum
[INFO] [stderr] 15 |         Quit,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 16 |         Move { x: i32, y: i32 },
[INFO] [stderr]    |         ^^^^
[INFO] [stderr] 17 |         Write(String),
[INFO] [stderr] 18 |         ChangeColor(i32),
[INFO] [stderr]    |         ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Small`, `Medium`, and `XL` are never constructed
[INFO] [stderr]   --> src/enums.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |     enum EggSize {
[INFO] [stderr]    |          ------- variants in this enum
[INFO] [stderr] 36 |         Small,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 37 |         Medium,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 38 |         Large,
[INFO] [stderr] 39 |         XL,
[INFO] [stderr]    |         ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `EggSize` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `active` and `sign_in_count` are never read
[INFO] [stderr]  --> src/structs.rs:3:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     struct User {
[INFO] [stderr]   |            ---- fields in this struct
[INFO] [stderr] 3 |         active: bool,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 6 |         sign_in_count: u64,
[INFO] [stderr]   |         ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `width` is never used
[INFO] [stderr]   --> src/structs.rs:53:12
[INFO] [stderr]    |
[INFO] [stderr] 52 |     impl Rectangle {
[INFO] [stderr]    |     -------------- method in this implementation
[INFO] [stderr] 53 |         fn width(&self) -> bool {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `tutorial` (bin "tutorial" test) generated 12 warnings (run `cargo fix --bin "tutorial" -p tutorial --tests` to apply 5 suggestions)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/release/deps/tutorial-69a69d28654f0212)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74", kill_on_drop: false }`
[INFO] [stdout] 8af5f03a466fe19eac606bf702e5e013108056e3510921bc8736f63c19baaf74
