[INFO] cloning repository https://github.com/sagaban/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sagaban/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagaban%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagaban%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2d7f259cdc0f6ca066acfa22d49b7a66667afd24
[INFO] testing sagaban/rust-by-example against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsagaban%2Frust-by-example" "/workspace/builds/worker-58/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-58/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sagaban/rust-by-example on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sagaban/rust-by-example
[INFO] finished tweaking git repo https://github.com/sagaban/rust-by-example
[INFO] tweaked toml for git repo https://github.com/sagaban/rust-by-example written to /workspace/builds/worker-58/source/Cargo.toml
[INFO] crate git repo https://github.com/sagaban/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65d81659b96bdb9ffcd2d6447d6cdb83e2ccb62138a12ef748811a578f9f82ca
[INFO] running `Command { std: "docker" "start" "-a" "65d81659b96bdb9ffcd2d6447d6cdb83e2ccb62138a12ef748811a578f9f82ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65d81659b96bdb9ffcd2d6447d6cdb83e2ccb62138a12ef748811a578f9f82ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65d81659b96bdb9ffcd2d6447d6cdb83e2ccb62138a12ef748811a578f9f82ca", kill_on_drop: false }`
[INFO] [stdout] 65d81659b96bdb9ffcd2d6447d6cdb83e2ccb62138a12ef748811a578f9f82ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bb34d5845b7450a9b74a7f74f5892df7a05dd1e78d8d518dceaf99d11d0fef5
[INFO] running `Command { std: "docker" "start" "-a" "2bb34d5845b7450a9b74a7f74f5892df7a05dd1e78d8d518dceaf99d11d0fef5", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `logical`
[INFO] [stdout]   --> src/chapters/c02.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 |   let logical: bool = true;
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_float`
[INFO] [stdout]   --> src/chapters/c02.rs:27:7
[INFO] [stdout]    |
[INFO] [stdout] 27 |   let a_float: f64 = 1.0; // Regular annotation
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `an_integer`
[INFO] [stdout]   --> src/chapters/c02.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 |   let an_integer = 5i32; // Suffix annotation
[INFO] [stdout]    |       ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_float`
[INFO] [stdout]   --> src/chapters/c02.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 |   let default_float = 3.0; // `f64`
[INFO] [stdout]    |       ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_integer`
[INFO] [stdout]   --> src/chapters/c02.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 |   let default_integer = 7; // `i32`
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stdout]   --> src/chapters/c02.rs:35:11
[INFO] [stdout]    |
[INFO] [stdout] 35 |   let mut inferred_type = 12; // Type i64 is inferred from another line
[INFO] [stdout]    |           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_inferred_type` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/chapters/c02.rs:36:3
[INFO] [stdout]    |
[INFO] [stdout] 36 |   inferred_type = 4294967296i64;
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> src/chapters/c02.rs:39:11
[INFO] [stdout]    |
[INFO] [stdout] 39 |   let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> src/chapters/c02.rs:40:3
[INFO] [stdout]    |
[INFO] [stdout] 40 |   mutable = 21;
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutable`
[INFO] [stdout]   --> src/chapters/c02.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |   let mutable = true;
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/chapters/c03.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     name: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/chapters/c03.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/chapters/c03.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     age: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/chapters/c03.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]    --> src/chapters/c03.rs:220:5
[INFO] [stdout]     |
[INFO] [stdout] 220 |     Subtract,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c_liKe_enums` should have a snake case name
[INFO] [stdout]    --> src/chapters/c03.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 | pub fn c_liKe_enums() {
[INFO] [stdout]     |        ^^^^^^^^^^^^ help: convert the identifier to snake case: `c_li_ke_enums`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.92s
[INFO] running `Command { std: "docker" "inspect" "2bb34d5845b7450a9b74a7f74f5892df7a05dd1e78d8d518dceaf99d11d0fef5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb34d5845b7450a9b74a7f74f5892df7a05dd1e78d8d518dceaf99d11d0fef5", kill_on_drop: false }`
[INFO] [stdout] 2bb34d5845b7450a9b74a7f74f5892df7a05dd1e78d8d518dceaf99d11d0fef5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b50828731742ed385d7dede1327ceb0ec00df20c0a006f6ce6fad00741c9a4fb
[INFO] running `Command { std: "docker" "start" "-a" "b50828731742ed385d7dede1327ceb0ec00df20c0a006f6ce6fad00741c9a4fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `logical`
[INFO] [stdout]   --> src/chapters/c02.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 |   let logical: bool = true;
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a_float`
[INFO] [stdout]   --> src/chapters/c02.rs:27:7
[INFO] [stdout]    |
[INFO] [stdout] 27 |   let a_float: f64 = 1.0; // Regular annotation
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `an_integer`
[INFO] [stdout]   --> src/chapters/c02.rs:28:7
[INFO] [stdout]    |
[INFO] [stdout] 28 |   let an_integer = 5i32; // Suffix annotation
[INFO] [stdout]    |       ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_float`
[INFO] [stdout]   --> src/chapters/c02.rs:31:7
[INFO] [stdout]    |
[INFO] [stdout] 31 |   let default_float = 3.0; // `f64`
[INFO] [stdout]    |       ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `default_integer`
[INFO] [stdout]   --> src/chapters/c02.rs:32:7
[INFO] [stdout]    |
[INFO] [stdout] 32 |   let default_integer = 7; // `i32`
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stdout]   --> src/chapters/c02.rs:35:11
[INFO] [stdout]    |
[INFO] [stdout] 35 |   let mut inferred_type = 12; // Type i64 is inferred from another line
[INFO] [stdout]    |           ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_inferred_type` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `inferred_type` is never read
[INFO] [stdout]   --> src/chapters/c02.rs:36:3
[INFO] [stdout]    |
[INFO] [stdout] 36 |   inferred_type = 4294967296i64;
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `mutable` is assigned to, but never used
[INFO] [stdout]   --> src/chapters/c02.rs:39:11
[INFO] [stdout]    |
[INFO] [stdout] 39 |   let mut mutable = 12; // Mutable `i32`
[INFO] [stdout]    |           ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_mutable` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `mutable` is never read
[INFO] [stdout]   --> src/chapters/c02.rs:40:3
[INFO] [stdout]    |
[INFO] [stdout] 40 |   mutable = 21;
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mutable`
[INFO] [stdout]   --> src/chapters/c02.rs:46:7
[INFO] [stdout]    |
[INFO] [stdout] 46 |   let mutable = true;
[INFO] [stdout]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/chapters/c03.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     name: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/chapters/c03.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> src/chapters/c03.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     age: u8,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/chapters/c03.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |   #[derive(Debug)]
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]    --> src/chapters/c03.rs:220:5
[INFO] [stdout]     |
[INFO] [stdout] 220 |     Subtract,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `c_liKe_enums` should have a snake case name
[INFO] [stdout]    --> src/chapters/c03.rs:281:8
[INFO] [stdout]     |
[INFO] [stdout] 281 | pub fn c_liKe_enums() {
[INFO] [stdout]     |        ^^^^^^^^^^^^ help: convert the identifier to snake case: `c_li_ke_enums`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.35s
[INFO] running `Command { std: "docker" "inspect" "b50828731742ed385d7dede1327ceb0ec00df20c0a006f6ce6fad00741c9a4fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b50828731742ed385d7dede1327ceb0ec00df20c0a006f6ce6fad00741c9a4fb", kill_on_drop: false }`
[INFO] [stdout] b50828731742ed385d7dede1327ceb0ec00df20c0a006f6ce6fad00741c9a4fb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-58/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d30242058b38051fe72a69c431be60f82420ffb21c1ee49e4f840fb3a15fcd4a
[INFO] running `Command { std: "docker" "start" "-a" "d30242058b38051fe72a69c431be60f82420ffb21c1ee49e4f840fb3a15fcd4a", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]   --> src/chapters/c02.rs:25:7
[INFO] [stderr]    |
[INFO] [stderr] 25 |   let logical: bool = true;
[INFO] [stderr]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]   --> src/chapters/c02.rs:27:7
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let a_float: f64 = 1.0; // Regular annotation
[INFO] [stderr]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]   --> src/chapters/c02.rs:28:7
[INFO] [stderr]    |
[INFO] [stderr] 28 |   let an_integer = 5i32; // Suffix annotation
[INFO] [stderr]    |       ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]   --> src/chapters/c02.rs:31:7
[INFO] [stderr]    |
[INFO] [stderr] 31 |   let default_float = 3.0; // `f64`
[INFO] [stderr]    |       ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_integer`
[INFO] [stderr]   --> src/chapters/c02.rs:32:7
[INFO] [stderr]    |
[INFO] [stderr] 32 |   let default_integer = 7; // `i32`
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stderr]   --> src/chapters/c02.rs:35:11
[INFO] [stderr]    |
[INFO] [stderr] 35 |   let mut inferred_type = 12; // Type i64 is inferred from another line
[INFO] [stderr]    |           ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_inferred_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]   --> src/chapters/c02.rs:36:3
[INFO] [stderr]    |
[INFO] [stderr] 36 |   inferred_type = 4294967296i64;
[INFO] [stderr]    |   ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable `mutable` is assigned to, but never used
[INFO] [stderr]   --> src/chapters/c02.rs:39:11
[INFO] [stderr]    |
[INFO] [stderr] 39 |   let mut mutable = 12; // Mutable `i32`
[INFO] [stderr]    |           ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> src/chapters/c02.rs:40:3
[INFO] [stderr]    |
[INFO] [stderr] 40 |   mutable = 21;
[INFO] [stderr]    |   ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]   --> src/chapters/c02.rs:46:7
[INFO] [stderr]    |
[INFO] [stderr] 46 |   let mutable = true;
[INFO] [stderr]    |       ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/chapters/c03.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     name: &'a str,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/chapters/c03.rs:21:12
[INFO] [stderr]    |
[INFO] [stderr] 21 |   #[derive(Debug)]
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `age`
[INFO] [stderr]   --> src/chapters/c03.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     age: u8,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/chapters/c03.rs:21:12
[INFO] [stderr]    |
[INFO] [stderr] 21 |   #[derive(Debug)]
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Subtract`
[INFO] [stderr]    --> src/chapters/c03.rs:220:5
[INFO] [stderr]     |
[INFO] [stderr] 220 |     Subtract,
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `c_liKe_enums` should have a snake case name
[INFO] [stderr]    --> src/chapters/c03.rs:281:8
[INFO] [stderr]     |
[INFO] [stderr] 281 | pub fn c_liKe_enums() {
[INFO] [stderr]     |        ^^^^^^^^^^^^ help: convert the identifier to snake case: `c_li_ke_enums`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-by-example` (bin "rust-by-example" test) generated 14 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_by_example-8f66b44072806835)
[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" "d30242058b38051fe72a69c431be60f82420ffb21c1ee49e4f840fb3a15fcd4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d30242058b38051fe72a69c431be60f82420ffb21c1ee49e4f840fb3a15fcd4a", kill_on_drop: false }`
[INFO] [stdout] d30242058b38051fe72a69c431be60f82420ffb21c1ee49e4f840fb3a15fcd4a