[INFO] cloning repository https://github.com/Medsko/study-crate
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Medsko/study-crate" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f21157493b3574c7d1d682316c7df5ba4a16c80
[INFO] testing Medsko/study-crate against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMedsko%2Fstudy-crate" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Medsko/study-crate on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Medsko/study-crate
[INFO] finished tweaking git repo https://github.com/Medsko/study-crate
[INFO] tweaked toml for git repo https://github.com/Medsko/study-crate written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/Medsko/study-crate already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dc19fc32fe66b69216959d63bed7ae6af78fc188eecd5258fd5cc875df1f8749
[INFO] running `Command { std: "docker" "start" "-a" "dc19fc32fe66b69216959d63bed7ae6af78fc188eecd5258fd5cc875df1f8749", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dc19fc32fe66b69216959d63bed7ae6af78fc188eecd5258fd5cc875df1f8749", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc19fc32fe66b69216959d63bed7ae6af78fc188eecd5258fd5cc875df1f8749", kill_on_drop: false }`
[INFO] [stdout] dc19fc32fe66b69216959d63bed7ae6af78fc188eecd5258fd5cc875df1f8749
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3ced79150e0cd70423922658f11417b8492fa4408d2f98036b9f40f2ada3a072
[INFO] running `Command { std: "docker" "start" "-a" "3ced79150e0cd70423922658f11417b8492fa4408d2f98036b9f40f2ada3a072", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling study-crate v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `second_user`
[INFO] [stdout]   --> src/prepackages/structs.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let second_user = User {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_user`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> src/prepackages/structs.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let black = Color(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/prepackages/structs.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let origin = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let four = IpAddrKind::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hip`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let hip = IpAddrKind::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_hip`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let loopback = IpAddr {
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `concise_loopback`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let concise_loopback = ConciseIpAddr::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_concise_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let home = ConciseIpAddr::V4(127, 0, 0, 1);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `yet_another_string`
[INFO] [stdout]   --> src/prepackages/ownership.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let yet_another_string = "Hi".to_string();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_yet_another_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `immutable_pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let immutable_pointer = &yet_another_string;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_immutable_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_immutable_pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let another_immutable_pointer = &yet_another_string;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_immutable_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let pointer = &mut yet_another_string;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_first_four_chars`
[INFO] [stdout]    --> src/prepackages/ownership.rs:111:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let splice_first_four_chars = &s[0..4];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_first_four_chars_also`
[INFO] [stdout]    --> src/prepackages/ownership.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let splice_first_four_chars_also = &s[..4];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars_also`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_chars_from_fourth`
[INFO] [stdout]    --> src/prepackages/ownership.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let splice_chars_from_fourth = &s[4..];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_chars_from_fourth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello_file`
[INFO] [stdout]  --> src/exceptions.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let hello_file = match File::open("hello.txt") {
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/exceptions.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |         Err(error) => panic!("Could not read the current directory!")
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/collections/vectors.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     match counts.iter().max_by_key(|&(key, value)| value) {
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/prepackages/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Color`
[INFO] [stdout]  --> src/prepackages/structs.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]   --> src/prepackages/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_structs`
[INFO] [stdout]   --> src/prepackages/structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn first_structs() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]   --> src/prepackages/structs.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn build_user(email: String, username1: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_square`
[INFO] [stdout]   --> src/prepackages/structs.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn is_square(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `transform_to_circle`
[INFO] [stdout]   --> src/prepackages/structs.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn transform_to_circle(self) -> Circle {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/prepackages/structs.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `stretch`
[INFO] [stdout]   --> src/prepackages/structs.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | Quit,                       // - geen velden (Unit struct)
[INFO] [stdout]    | ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | ChangeColor(i32, i32, i32), // - (idem)
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Oregon`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Oregon,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Coin {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value_in_cents`
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `plus_one`
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_first_word`
[INFO] [stdout]    --> src/prepackages/ownership.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn slice_first_word(s: &String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]    --> src/prepackages/ownership.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn first_word(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.37s
[INFO] running `Command { std: "docker" "inspect" "3ced79150e0cd70423922658f11417b8492fa4408d2f98036b9f40f2ada3a072", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ced79150e0cd70423922658f11417b8492fa4408d2f98036b9f40f2ada3a072", kill_on_drop: false }`
[INFO] [stdout] 3ced79150e0cd70423922658f11417b8492fa4408d2f98036b9f40f2ada3a072
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12da4370615d548d7d97456531da915c99189752280f224e236987538cc2a7d2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "12da4370615d548d7d97456531da915c99189752280f224e236987538cc2a7d2", kill_on_drop: false }`
[INFO] [stderr]    Compiling study-crate v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `second_user`
[INFO] [stdout]   --> src/prepackages/structs.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let second_user = User {
[INFO] [stdout]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_user`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `black`
[INFO] [stdout]   --> src/prepackages/structs.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let black = Color(0,0,0);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `origin`
[INFO] [stdout]   --> src/prepackages/structs.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let origin = Point(0,0,0);
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `four`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let four = IpAddrKind::V4;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hip`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let hip = IpAddrKind::V6;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_hip`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loopback`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let loopback = IpAddr {
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `concise_loopback`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let concise_loopback = ConciseIpAddr::V6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_concise_loopback`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:54:9
[INFO] [stdout]    |
[INFO] [stdout] 54 |     let home = ConciseIpAddr::V4(127, 0, 0, 1);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `yet_another_string`
[INFO] [stdout]   --> src/prepackages/ownership.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let yet_another_string = "Hi".to_string();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_yet_another_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `immutable_pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let immutable_pointer = &yet_another_string;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_immutable_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_immutable_pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:76:9
[INFO] [stdout]    |
[INFO] [stdout] 76 |     let another_immutable_pointer = &yet_another_string;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_immutable_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `pointer`
[INFO] [stdout]   --> src/prepackages/ownership.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let pointer = &mut yet_another_string;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pointer`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_first_four_chars`
[INFO] [stdout]    --> src/prepackages/ownership.rs:111:9
[INFO] [stdout]     |
[INFO] [stdout] 111 |     let splice_first_four_chars = &s[0..4];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_first_four_chars_also`
[INFO] [stdout]    --> src/prepackages/ownership.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let splice_first_four_chars_also = &s[..4];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars_also`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `splice_chars_from_fourth`
[INFO] [stdout]    --> src/prepackages/ownership.rs:114:9
[INFO] [stdout]     |
[INFO] [stdout] 114 |     let splice_chars_from_fourth = &s[4..];
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_chars_from_fourth`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello_file`
[INFO] [stdout]  --> src/exceptions.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let hello_file = match File::open("hello.txt") {
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_file`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `error`
[INFO] [stdout]   --> src/exceptions.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 22 |         Err(error) => panic!("Could not read the current directory!")
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `key`
[INFO] [stdout]   --> src/collections/vectors.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 35 |     match counts.iter().max_by_key(|&(key, value)| value) {
[INFO] [stdout]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `User`
[INFO] [stdout]  --> src/prepackages/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Color`
[INFO] [stdout]  --> src/prepackages/structs.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct Color(i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]   --> src/prepackages/structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_structs`
[INFO] [stdout]   --> src/prepackages/structs.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn first_structs() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_user`
[INFO] [stdout]   --> src/prepackages/structs.rs:41:4
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn build_user(email: String, username1: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `is_square`
[INFO] [stdout]   --> src/prepackages/structs.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 |     fn is_square(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `transform_to_circle`
[INFO] [stdout]   --> src/prepackages/structs.rs:79:8
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn transform_to_circle(self) -> Circle {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `can_hold`
[INFO] [stdout]   --> src/prepackages/structs.rs:83:8
[INFO] [stdout]    |
[INFO] [stdout] 83 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `stretch`
[INFO] [stdout]   --> src/prepackages/structs.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | Quit,                       // - geen velden (Unit struct)
[INFO] [stdout]    | ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ChangeColor`
[INFO] [stdout]   --> src/prepackages/enums/enums.rs:20:1
[INFO] [stdout]    |
[INFO] [stdout] 20 | ChangeColor(i32, i32, i32), // - (idem)
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Alabama,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Alaska,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Oregon`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Oregon,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Coin`
[INFO] [stdout]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stdout]   |
[INFO] [stdout] 9 | enum Coin {
[INFO] [stdout]   |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `value_in_cents`
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `plus_one`
[INFO] [stdout]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stdout]    |
[INFO] [stdout] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `slice_first_word`
[INFO] [stdout]    --> src/prepackages/ownership.rs:121:4
[INFO] [stdout]     |
[INFO] [stdout] 121 | fn slice_first_word(s: &String) -> &str {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `first_word`
[INFO] [stdout]    --> src/prepackages/ownership.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn first_word(s: &String) -> usize {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `Command { std: "docker" "inspect" "12da4370615d548d7d97456531da915c99189752280f224e236987538cc2a7d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12da4370615d548d7d97456531da915c99189752280f224e236987538cc2a7d2", kill_on_drop: false }`
[INFO] [stdout] 12da4370615d548d7d97456531da915c99189752280f224e236987538cc2a7d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e9e881ed93665997056113363bf6beccee9efdf7b7e941a163f3a022958b78cf
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e9e881ed93665997056113363bf6beccee9efdf7b7e941a163f3a022958b78cf", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `second_user`
[INFO] [stderr]   --> src/prepackages/structs.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let second_user = User {
[INFO] [stderr]    |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_second_user`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `black`
[INFO] [stderr]   --> src/prepackages/structs.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let black = Color(0,0,0);
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_black`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]   --> src/prepackages/structs.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let origin = Point(0,0,0);
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_origin`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let four = IpAddrKind::V4;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hip`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let hip = IpAddrKind::V6;
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_hip`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `loopback`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let loopback = IpAddr {
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loopback`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `concise_loopback`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let concise_loopback = ConciseIpAddr::V6(String::from("::1"));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_concise_loopback`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let home = ConciseIpAddr::V4(127, 0, 0, 1);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `yet_another_string`
[INFO] [stderr]   --> src/prepackages/ownership.rs:69:9
[INFO] [stderr]    |
[INFO] [stderr] 69 |     let yet_another_string = "Hi".to_string();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_yet_another_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `immutable_pointer`
[INFO] [stderr]   --> src/prepackages/ownership.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let immutable_pointer = &yet_another_string;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_immutable_pointer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `another_immutable_pointer`
[INFO] [stderr]   --> src/prepackages/ownership.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |     let another_immutable_pointer = &yet_another_string;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_immutable_pointer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pointer`
[INFO] [stderr]   --> src/prepackages/ownership.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 |     let pointer = &mut yet_another_string;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_pointer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `splice_first_four_chars`
[INFO] [stderr]    --> src/prepackages/ownership.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |     let splice_first_four_chars = &s[0..4];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `splice_first_four_chars_also`
[INFO] [stderr]    --> src/prepackages/ownership.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |     let splice_first_four_chars_also = &s[..4];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_first_four_chars_also`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `splice_chars_from_fourth`
[INFO] [stderr]    --> src/prepackages/ownership.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 |     let splice_chars_from_fourth = &s[4..];
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_splice_chars_from_fourth`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_file`
[INFO] [stderr]  --> src/exceptions.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let hello_file = match File::open("hello.txt") {
[INFO] [stderr]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_file`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `error`
[INFO] [stderr]   --> src/exceptions.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |         Err(error) => panic!("Could not read the current directory!")
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_error`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/collections/vectors.rs:35:39
[INFO] [stderr]    |
[INFO] [stderr] 35 |     match counts.iter().max_by_key(|&(key, value)| value) {
[INFO] [stderr]    |                                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `User`
[INFO] [stderr]  --> src/prepackages/structs.rs:2:8
[INFO] [stderr]   |
[INFO] [stderr] 2 | struct User {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Color`
[INFO] [stderr]  --> src/prepackages/structs.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 | struct Color(i32, i32, i32);
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point`
[INFO] [stderr]   --> src/prepackages/structs.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct Point(i32, i32, i32);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_structs`
[INFO] [stderr]   --> src/prepackages/structs.rs:19:4
[INFO] [stderr]    |
[INFO] [stderr] 19 | fn first_structs() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `build_user`
[INFO] [stderr]   --> src/prepackages/structs.rs:41:4
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn build_user(email: String, username1: String) -> User {
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `is_square`
[INFO] [stderr]   --> src/prepackages/structs.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 74 |     fn is_square(&self) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `transform_to_circle`
[INFO] [stderr]   --> src/prepackages/structs.rs:79:8
[INFO] [stderr]    |
[INFO] [stderr] 79 |     fn transform_to_circle(self) -> Circle {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `can_hold`
[INFO] [stderr]   --> src/prepackages/structs.rs:83:8
[INFO] [stderr]    |
[INFO] [stderr] 83 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `stretch`
[INFO] [stderr]   --> src/prepackages/structs.rs:87:8
[INFO] [stderr]    |
[INFO] [stderr] 87 |     fn stretch(&mut self, add_height: u32, add_width: u32) {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | Quit,                       // - geen velden (Unit struct)
[INFO] [stderr]    | ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]   --> src/prepackages/enums/enums.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | ChangeColor(i32, i32, i32), // - (idem)
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alabama`
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     Alabama,
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alaska`
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     Alaska,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Oregon`
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Oregon,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `Coin`
[INFO] [stderr]  --> src/prepackages/enums/matching.rs:9:6
[INFO] [stderr]   |
[INFO] [stderr] 9 | enum Coin {
[INFO] [stderr]   |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `value_in_cents`
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn value_in_cents(&self) -> u8 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `plus_one`
[INFO] [stderr]   --> src/prepackages/enums/matching.rs:49:4
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn plus_one(x: Option<i32>) -> Option<i32> {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `slice_first_word`
[INFO] [stderr]    --> src/prepackages/ownership.rs:121:4
[INFO] [stderr]     |
[INFO] [stderr] 121 | fn slice_first_word(s: &String) -> &str {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]    --> src/prepackages/ownership.rs:137:4
[INFO] [stderr]     |
[INFO] [stderr] 137 | fn first_word(s: &String) -> usize {
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 37 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/study_crate-45428b6773d5f17e
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e9e881ed93665997056113363bf6beccee9efdf7b7e941a163f3a022958b78cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9e881ed93665997056113363bf6beccee9efdf7b7e941a163f3a022958b78cf", kill_on_drop: false }`
[INFO] [stdout] e9e881ed93665997056113363bf6beccee9efdf7b7e941a163f3a022958b78cf
