[INFO] cloning repository https://github.com/wjh756381193/rustcourse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wjh756381193/rustcourse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwjh756381193%2Frustcourse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwjh756381193%2Frustcourse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c52894d8438c449dcbe63962122a675ba67d45d0
[INFO] checking wjh756381193/rustcourse against try#f3d95de532264a1215023baa665c0028aecf74b1 for pr-148477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwjh756381193%2Frustcourse" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wjh756381193/rustcourse
[INFO] finished tweaking git repo https://github.com/wjh756381193/rustcourse
[INFO] tweaked toml for git repo https://github.com/wjh756381193/rustcourse written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wjh756381193/rustcourse on toolchain f3d95de532264a1215023baa665c0028aecf74b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wjh756381193/rustcourse 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" "+f3d95de532264a1215023baa665c0028aecf74b1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking wjh756381193/rustcourse against try#f3d95de532264a1215023baa665c0028aecf74b1 for pr-148477
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwjh756381193%2Frustcourse" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/wjh756381193/rustcourse
[INFO] finished tweaking git repo https://github.com/wjh756381193/rustcourse
[INFO] tweaked toml for git repo https://github.com/wjh756381193/rustcourse written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/wjh756381193/rustcourse on toolchain f3d95de532264a1215023baa665c0028aecf74b1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/wjh756381193/rustcourse 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" "+f3d95de532264a1215023baa665c0028aecf74b1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da7ff8edab228ec0e68ae9990c585fc6b4f8d07b09cf06b1ccd8c8683fe3b1c1
[INFO] running `Command { std: "docker" "start" "-a" "da7ff8edab228ec0e68ae9990c585fc6b4f8d07b09cf06b1ccd8c8683fe3b1c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da7ff8edab228ec0e68ae9990c585fc6b4f8d07b09cf06b1ccd8c8683fe3b1c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da7ff8edab228ec0e68ae9990c585fc6b4f8d07b09cf06b1ccd8c8683fe3b1c1", kill_on_drop: false }`
[INFO] [stdout] da7ff8edab228ec0e68ae9990c585fc6b4f8d07b09cf06b1ccd8c8683fe3b1c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+f3d95de532264a1215023baa665c0028aecf74b1" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 93c720a23102617e0852d46e71de4961478acd724209fa90983dcb063f0b3c90
[INFO] running `Command { std: "docker" "start" "-a" "93c720a23102617e0852d46e71de4961478acd724209fa90983dcb063f0b3c90", kill_on_drop: false }`
[INFO] [stderr]     Checking rust0526 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/a36.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut stream = data().chunks(2);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/bin/a36.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut stream = data().chunks(2);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Body` is never used
[INFO] [stdout]   --> src/bin/a30.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait Body {}
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Color` is never used
[INFO] [stdout]   --> src/bin/a30.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Color {}
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Mon`, `Tue`, `Wed`, `Thu`, `Fri`, and `Sun` are never constructed
[INFO] [stdout]   --> src/bin/a7.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum Week {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 26 |     Mon, Tue, Wed, Thu, Fri, Sat, Sun
[INFO] [stdout]    |     ^^^  ^^^  ^^^  ^^^  ^^^       ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `clamp` is never used
[INFO] [stdout]   --> src/bin/a22.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn clamp(n: i32, lower: i32, upper: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `div` is never used
[INFO] [stdout]   --> src/bin/a22.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn div(a: i32, b: i32) -> Option<i32> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `concat` is never used
[INFO] [stdout]   --> src/bin/a22.rs:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn concat(first: &str, second: &str) -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `crossbeam_channel`
[INFO] [stdout]   --> src/bin/a39.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 | use crossbeam_channel::{unbounded, Receiver};
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `crossbeam_channel`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `crossbeam_channel`, use `cargo add crossbeam_channel` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/bin/a21.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_user` is never used
[INFO] [stdout]   --> src/bin/a21.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_user(name: &str) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self`
[INFO] [stdout]   --> src/bin/a39.rs:25:19
[INFO] [stdout]    |
[INFO] [stdout] 25 | use std::thread::{self, JoinHandle};
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `no`
[INFO] [stdout]  --> src/main.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                ^^ help: if this is intentional, prefix it with an underscore: `_no`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chi`
[INFO] [stdout]  --> src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                    ^^^ help: if this is intentional, prefix it with an underscore: `_chi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eng`
[INFO] [stdout]  --> src/main.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                         ^^^ help: if this is intentional, prefix it with an underscore: `_eng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat`
[INFO] [stdout]  --> src/main.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                              ^^^ help: if this is intentional, prefix it with an underscore: `_mat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]   --> src/bin/a21.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct User {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `find_user` is never used
[INFO] [stdout]   --> src/bin/a21.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn find_user(name: &str) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `avg`
[INFO] [stdout]  --> src/main.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_avg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `studentA` should have a snake case name
[INFO] [stdout]  --> src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let studentA = ("nameA", 12, 100, 98, 99, 99.0);
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `student_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/a39.rs:38:56
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn spawn_light_thread(receiver: Receiver<LightMsg>) -> JoinHandle<LightStatus> {
[INFO] [stdout]    |    ------------------                                  ^^^^^^^^^^^^^^^^^^^^^^^ expected `JoinHandle<LightStatus>`, found `()`
[INFO] [stdout]    |    |
[INFO] [stdout]    |    implicitly returns `()` as its body has no tail or `return` expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected struct `JoinHandle<LightStatus>`
[INFO] [stdout]            found unit type `()`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ServicePriority` is never used
[INFO] [stdout]   --> src/bin/a29.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum ServicePriority {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Priority` is never used
[INFO] [stdout]   --> src/bin/a29.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait Priority {
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ImportantGuest` is never constructed
[INFO] [stdout]   --> src/bin/a29.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct ImportantGuest;
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Guest` is never constructed
[INFO] [stdout]   --> src/bin/a29.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Guest;
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0432.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust0526` (bin "a39") due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]   --> src/bin/a28.rs:13:6
[INFO] [stdout]    |
[INFO] [stdout] 13 | enum Color {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/bin/a24.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let data = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/a36.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut stream = data().chunks(2);
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `no`
[INFO] [stdout]  --> src/main.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                ^^ help: if this is intentional, prefix it with an underscore: `_no`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chi`
[INFO] [stdout]  --> src/main.rs:6:20
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                    ^^^ help: if this is intentional, prefix it with an underscore: `_chi`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `eng`
[INFO] [stdout]  --> src/main.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                         ^^^ help: if this is intentional, prefix it with an underscore: `_eng`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mat`
[INFO] [stdout]  --> src/main.rs:6:30
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                              ^^^ help: if this is intentional, prefix it with an underscore: `_mat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `avg`
[INFO] [stdout]  --> src/main.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let (name, no, chi, eng, mat, avg) = studentA;
[INFO] [stdout]   |                                   ^^^ help: if this is intentional, prefix it with an underscore: `_avg`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `studentA` should have a snake case name
[INFO] [stdout]  --> src/main.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let studentA = ("nameA", 12, 100, 98, 99, 99.0);
[INFO] [stdout]   |         ^^^^^^^^ help: convert the identifier to snake case: `student_a`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stream`
[INFO] [stdout]   --> src/bin/a36.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut stream = data().chunks(2);
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stream`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Body` is never used
[INFO] [stdout]   --> src/bin/a30.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait Body {}
[INFO] [stdout]    |       ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Color` is never used
[INFO] [stdout]   --> src/bin/a30.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 | trait Color {}
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/bin/a24.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let data = vec![1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "93c720a23102617e0852d46e71de4961478acd724209fa90983dcb063f0b3c90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93c720a23102617e0852d46e71de4961478acd724209fa90983dcb063f0b3c90", kill_on_drop: false }`
[INFO] [stdout] 93c720a23102617e0852d46e71de4961478acd724209fa90983dcb063f0b3c90