[INFO] cloning repository https://github.com/kamikaze/rust-training
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kamikaze/rust-training" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamikaze%2Frust-training", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamikaze%2Frust-training'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8b4a874c17aa1aa51dc37a1bfc8c5cf6bb088aa
[INFO] testing kamikaze/rust-training against 1.83.0 for beta-1.84.0-4-retry
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkamikaze%2Frust-training" "/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/kamikaze/rust-training on toolchain 1.83.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kamikaze/rust-training
[INFO] finished tweaking git repo https://github.com/kamikaze/rust-training
[INFO] tweaked toml for git repo https://github.com/kamikaze/rust-training written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/kamikaze/rust-training 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" "+1.83.0" "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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9ae3f9ed33872f4b7c2e53d68cb11ed723099c16bb6b972bd948a38c59c41f1b
[INFO] running `Command { std: "docker" "start" "-a" "9ae3f9ed33872f4b7c2e53d68cb11ed723099c16bb6b972bd948a38c59c41f1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9ae3f9ed33872f4b7c2e53d68cb11ed723099c16bb6b972bd948a38c59c41f1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ae3f9ed33872f4b7c2e53d68cb11ed723099c16bb6b972bd948a38c59c41f1b", kill_on_drop: false }`
[INFO] [stdout] 9ae3f9ed33872f4b7c2e53d68cb11ed723099c16bb6b972bd948a38c59c41f1b
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fdc8e17cb1d3678c007a1c34215bbb595ff40ac3e85cd218225f12cc0930855e
[INFO] running `Command { std: "docker" "start" "-a" "fdc8e17cb1d3678c007a1c34215bbb595ff40ac3e85cd218225f12cc0930855e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.89
[INFO] [stderr]    Compiling unicode-ident v1.0.13
[INFO] [stderr]    Compiling libc v0.2.162
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.87
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
[INFO] [stderr]    Compiling zerocopy v0.7.35
[INFO] [stderr]    Compiling ppv-lite86 v0.2.20
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust-training v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/functions.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let result = loop {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/ownership.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let s = "hello";
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/ownership.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let s = String::from("hello");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let y = x; // Copy
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/ownership.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let x = String::from("world");
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/ownership.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let x = "hello";
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> src/ownership.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let y = 22;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/references.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/slices.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let hello = &s[..5];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]   --> src/slices.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let world = &s[6..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello_world`
[INFO] [stdout]   --> src/slices.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello_world = &s[..];
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/slices.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut s = String::from("hello world");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/slices.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let word = first_word(&s2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/slices.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let slice = &a[..2];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/slices.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut s = String::from("hello world");
[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/slices.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut s = String::from("hello world");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/variables.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let a = 99_222;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/variables.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let b = 0xff;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/variables.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let c = 0o77;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/variables.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let d = 0b1111_0000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/variables.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let e = b'A';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let f: u8 = 255;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let f = 2.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]   --> src/variables.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let g: f32 = 3.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> src/variables.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let sum = 5 + 10;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> src/variables.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let difference = 95.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> src/variables.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let product = 4 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> src/variables.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let quotient = 56.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reminder`
[INFO] [stdout]   --> src/variables.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let reminder = 43 % 5;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reminder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/variables.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let t = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let f = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/variables.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let c = 'z';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heart_eyed_cat`
[INFO] [stdout]   --> src/variables.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let heart_eyed_cat = '😻';
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heart_eyed_cat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/variables.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let (name, count) = tup;
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/variables.rs:33:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let (name, count) = tup;
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/variables.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let count = tup.1;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `not_found`
[INFO] [stdout]   --> src/variables.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let not_found = error_codes[1];
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_not_found`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byte`
[INFO] [stdout]   --> src/variables.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let byte = [0; 8];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `b` is never used
[INFO] [stdout]  --> src/ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn b() {
[INFO] [stdout]   |        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a` is never used
[INFO] [stdout]  --> src/ownership.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn a() {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SUBSCRIBER_COUNT` is never used
[INFO] [stdout]  --> src/variables.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     const SUBSCRIBER_COUNT: u32 = 100000;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.01s
[INFO] running `Command { std: "docker" "inspect" "fdc8e17cb1d3678c007a1c34215bbb595ff40ac3e85cd218225f12cc0930855e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdc8e17cb1d3678c007a1c34215bbb595ff40ac3e85cd218225f12cc0930855e", kill_on_drop: false }`
[INFO] [stdout] fdc8e17cb1d3678c007a1c34215bbb595ff40ac3e85cd218225f12cc0930855e
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ed105bc5320245c3ef3ccac2db057082404e1b83706270d419d54113aa0c3034
[INFO] running `Command { std: "docker" "start" "-a" "ed105bc5320245c3ef3ccac2db057082404e1b83706270d419d54113aa0c3034", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-training v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]   --> src/functions.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let result = loop {
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/ownership.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let s = "hello";
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/ownership.rs:14:13
[INFO] [stdout]    |
[INFO] [stdout] 14 |         let s = String::from("hello");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/ownership.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let y = x; // Copy
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/ownership.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |         let x = String::from("world");
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/ownership.rs:7:13
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let x = "hello";
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]  --> src/ownership.rs:8:13
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let y = 22;
[INFO] [stdout]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/references.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let r1 = &mut s;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> src/slices.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let hello = &s[..5];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world`
[INFO] [stdout]   --> src/slices.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let world = &s[6..];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello_world`
[INFO] [stdout]   --> src/slices.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let hello_world = &s[..];
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/slices.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut s = String::from("hello world");
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/slices.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let word = first_word(&s2);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `slice`
[INFO] [stdout]   --> src/slices.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let slice = &a[..2];
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/slices.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let mut s = String::from("hello world");
[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/slices.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let mut s = String::from("hello world");
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]  --> src/variables.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let a = 99_222;
[INFO] [stdout]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/variables.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let b = 0xff;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/variables.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let c = 0o77;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> src/variables.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let d = 0b1111_0000;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> src/variables.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let e = b'A';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let f: u8 = 255;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let f = 2.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g`
[INFO] [stdout]   --> src/variables.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let g: f32 = 3.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> src/variables.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let sum = 5 + 10;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> src/variables.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let difference = 95.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> src/variables.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let product = 4 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> src/variables.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let quotient = 56.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `reminder`
[INFO] [stdout]   --> src/variables.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let reminder = 43 % 5;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reminder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/variables.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let t = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/variables.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let f = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/variables.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let c = 'z';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heart_eyed_cat`
[INFO] [stdout]   --> src/variables.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let heart_eyed_cat = '😻';
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heart_eyed_cat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/variables.rs:33:10
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let (name, count) = tup;
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/variables.rs:33:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let (name, count) = tup;
[INFO] [stdout]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count`
[INFO] [stdout]   --> src/variables.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let count = tup.1;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `not_found`
[INFO] [stdout]   --> src/variables.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let not_found = error_codes[1];
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_not_found`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `byte`
[INFO] [stdout]   --> src/variables.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let byte = [0; 8];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `b` is never used
[INFO] [stdout]  --> src/ownership.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 |     fn b() {
[INFO] [stdout]   |        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a` is never used
[INFO] [stdout]  --> src/ownership.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 |     fn a() {
[INFO] [stdout]   |        ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SUBSCRIBER_COUNT` is never used
[INFO] [stdout]  --> src/variables.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 |     const SUBSCRIBER_COUNT: u32 = 100000;
[INFO] [stdout]   |           ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.49s
[INFO] running `Command { std: "docker" "inspect" "ed105bc5320245c3ef3ccac2db057082404e1b83706270d419d54113aa0c3034", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed105bc5320245c3ef3ccac2db057082404e1b83706270d419d54113aa0c3034", kill_on_drop: false }`
[INFO] [stdout] ed105bc5320245c3ef3ccac2db057082404e1b83706270d419d54113aa0c3034
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 29c2aa550b0081e09c1c8ec0cdfac103ecb14fdb326f2cda4aa33be20f47358b
[INFO] running `Command { std: "docker" "start" "-a" "29c2aa550b0081e09c1c8ec0cdfac103ecb14fdb326f2cda4aa33be20f47358b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `result`
[INFO] [stderr]   --> src/functions.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let result = loop {
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/ownership.rs:13:13
[INFO] [stderr]    |
[INFO] [stderr] 13 |         let s = "hello";
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/ownership.rs:14:13
[INFO] [stderr]    |
[INFO] [stderr] 14 |         let s = String::from("hello");
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/ownership.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let y = x; // Copy
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/ownership.rs:3:13
[INFO] [stderr]   |
[INFO] [stderr] 3 |         let x = String::from("world");
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/ownership.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |         let x = "hello";
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]  --> src/ownership.rs:8:13
[INFO] [stderr]   |
[INFO] [stderr] 8 |         let y = 22;
[INFO] [stderr]   |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/references.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let r1 = &mut s;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]   --> src/slices.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let hello = &s[..5];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `world`
[INFO] [stderr]   --> src/slices.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let world = &s[6..];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_world`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_world`
[INFO] [stderr]   --> src/slices.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let hello_world = &s[..];
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/slices.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut s = String::from("hello world");
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/slices.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let word = first_word(&s2);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `slice`
[INFO] [stderr]   --> src/slices.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let slice = &a[..2];
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/slices.rs:14:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let mut s = String::from("hello world");
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/slices.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let mut s = String::from("hello world");
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]  --> src/variables.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let a = 99_222;
[INFO] [stderr]   |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> src/variables.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let b = 0xff;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/variables.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let c = 0o77;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `d`
[INFO] [stderr]   --> src/variables.rs:12:9
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let d = 0b1111_0000;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/variables.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let e = b'A';
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/variables.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     let f: u8 = 255;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/variables.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let f = 2.0;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g`
[INFO] [stderr]   --> src/variables.rs:18:9
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let g: f32 = 3.0;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_g`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sum`
[INFO] [stderr]   --> src/variables.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let sum = 5 + 10;
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `difference`
[INFO] [stderr]   --> src/variables.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |     let difference = 95.5 - 4.3;
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `product`
[INFO] [stderr]   --> src/variables.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let product = 4 * 30;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `quotient`
[INFO] [stderr]   --> src/variables.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let quotient = 56.7 / 32.2;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `reminder`
[INFO] [stderr]   --> src/variables.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let reminder = 43 % 5;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reminder`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/variables.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let t = true;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/variables.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let f = false;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/variables.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 29 |     let c = 'z';
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `heart_eyed_cat`
[INFO] [stderr]   --> src/variables.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |     let heart_eyed_cat = '😻';
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heart_eyed_cat`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]   --> src/variables.rs:33:10
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let (name, count) = tup;
[INFO] [stderr]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/variables.rs:33:16
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let (name, count) = tup;
[INFO] [stderr]    |                ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `count`
[INFO] [stderr]   --> src/variables.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let count = tup.1;
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_count`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `not_found`
[INFO] [stderr]   --> src/variables.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let not_found = error_codes[1];
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_not_found`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `byte`
[INFO] [stderr]   --> src/variables.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let byte = [0; 8];
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_byte`
[INFO] [stderr] 
[INFO] [stderr] warning: function `b` is never used
[INFO] [stderr]  --> src/ownership.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 |     fn b() {
[INFO] [stderr]   |        ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `a` is never used
[INFO] [stderr]  --> src/ownership.rs:6:8
[INFO] [stderr]   |
[INFO] [stderr] 6 |     fn a() {
[INFO] [stderr]   |        ^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `SUBSCRIBER_COUNT` is never used
[INFO] [stderr]  --> src/variables.rs:7:11
[INFO] [stderr]   |
[INFO] [stderr] 7 |     const SUBSCRIBER_COUNT: u32 = 100000;
[INFO] [stderr]   |           ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-training` (bin "rust-training" test) generated 41 warnings (run `cargo fix --bin "rust-training" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_training-28e383063e5f21d3)
[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" "29c2aa550b0081e09c1c8ec0cdfac103ecb14fdb326f2cda4aa33be20f47358b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29c2aa550b0081e09c1c8ec0cdfac103ecb14fdb326f2cda4aa33be20f47358b", kill_on_drop: false }`
[INFO] [stdout] 29c2aa550b0081e09c1c8ec0cdfac103ecb14fdb326f2cda4aa33be20f47358b
