[INFO] updating cached repository https://github.com/Mr-Malomz/rustlang_journey
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d1a46c6130df8a3c1879806fc863571e86c9422c
[INFO] testing Mr-Malomz/rustlang_journey against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMr-Malomz%2Frustlang_journey" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mr-Malomz/rustlang_journey on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Mr-Malomz/rustlang_journey
[INFO] finished tweaking git repo https://github.com/Mr-Malomz/rustlang_journey
[INFO] tweaked toml for git repo https://github.com/Mr-Malomz/rustlang_journey written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/Mr-Malomz/rustlang_journey already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 27c43b20f3bc1b8ef87aef4299707d8807c562ab1ef38ee3d838fbbfcbeeb22b
[INFO] running `"docker" "start" "-a" "27c43b20f3bc1b8ef87aef4299707d8807c562ab1ef38ee3d838fbbfcbeeb22b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rustlang_journey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/enums.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let four = IpAddrKind::V4;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `five`
[INFO] [stderr]   --> src/enums.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let five: &str;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_five`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]  --> src/enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     V4,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]  --> src/enums.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     V6,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]   --> src/enums.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     V4(u8, u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]   --> src/enums.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     V6(String),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/enums.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/enums.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Move { x: i32, y: i32 },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Write`
[INFO] [stderr]   --> src/enums.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Write(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]   --> src/enums.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Some`
[INFO] [stderr]   --> src/enums.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     Some(T), //this are Options in rust; they're used to check if variable is null or not
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]   --> src/enums.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Penny,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]   --> src/enums.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     Nickel,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]   --> src/enums.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     Dime,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quarter`
[INFO] [stderr]   --> src/enums.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Quarter,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `instanceOfEnum`
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `owner`
[INFO] [stderr]  --> src/ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn owner() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_length`
[INFO] [stderr]   --> src/ownership.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn calculate_length(s: &String) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]   --> src/ownership.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn first_word(s: &String) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]  --> src/structs.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Rectangle {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]  --> src/structs.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn area(&self) -> u32 {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `area`
[INFO] [stderr]   --> src/structs.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn area(rectangle: Rectangle) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_area`
[INFO] [stderr]  --> src/implementation.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn print_area(&self) {
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `instanceOfEnum` should have a snake case name
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `instance_of_enum`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 24 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `"docker" "inspect" "27c43b20f3bc1b8ef87aef4299707d8807c562ab1ef38ee3d838fbbfcbeeb22b"`
[INFO] running `"docker" "rm" "-f" "27c43b20f3bc1b8ef87aef4299707d8807c562ab1ef38ee3d838fbbfcbeeb22b"`
[INFO] [stdout] 27c43b20f3bc1b8ef87aef4299707d8807c562ab1ef38ee3d838fbbfcbeeb22b
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1a2e3fc8d3828d9f117b5b949bc96a2b74e1816a984dcce890b21c60eada9f82
[INFO] running `"docker" "start" "-a" "1a2e3fc8d3828d9f117b5b949bc96a2b74e1816a984dcce890b21c60eada9f82"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rustlang_journey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/enums.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let four = IpAddrKind::V4;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `five`
[INFO] [stderr]   --> src/enums.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let five: &str;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_five`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]  --> src/enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     V4,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]  --> src/enums.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     V6,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]   --> src/enums.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     V4(u8, u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]   --> src/enums.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     V6(String),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/enums.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/enums.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Move { x: i32, y: i32 },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Write`
[INFO] [stderr]   --> src/enums.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Write(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]   --> src/enums.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Some`
[INFO] [stderr]   --> src/enums.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     Some(T), //this are Options in rust; they're used to check if variable is null or not
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]   --> src/enums.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Penny,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]   --> src/enums.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     Nickel,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]   --> src/enums.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     Dime,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quarter`
[INFO] [stderr]   --> src/enums.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Quarter,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `instanceOfEnum`
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `owner`
[INFO] [stderr]  --> src/ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn owner() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_length`
[INFO] [stderr]   --> src/ownership.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn calculate_length(s: &String) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]   --> src/ownership.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn first_word(s: &String) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]  --> src/structs.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Rectangle {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]  --> src/structs.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn area(&self) -> u32 {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `area`
[INFO] [stderr]   --> src/structs.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn area(rectangle: Rectangle) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_area`
[INFO] [stderr]  --> src/implementation.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn print_area(&self) {
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `instanceOfEnum` should have a snake case name
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `instance_of_enum`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 24 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "1a2e3fc8d3828d9f117b5b949bc96a2b74e1816a984dcce890b21c60eada9f82"`
[INFO] running `"docker" "rm" "-f" "1a2e3fc8d3828d9f117b5b949bc96a2b74e1816a984dcce890b21c60eada9f82"`
[INFO] [stdout] 1a2e3fc8d3828d9f117b5b949bc96a2b74e1816a984dcce890b21c60eada9f82
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 16c5b7bbace1780af5f3ac2035292940bdffaf8adf6f1f27800ebab1b46028d9
[INFO] running `"docker" "start" "-a" "16c5b7bbace1780af5f3ac2035292940bdffaf8adf6f1f27800ebab1b46028d9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `four`
[INFO] [stderr]   --> src/enums.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |     let four = IpAddrKind::V4;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_four`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `five`
[INFO] [stderr]   --> src/enums.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |     let five: &str;
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_five`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]  --> src/enums.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 |     V4,
[INFO] [stderr]   |     ^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]  --> src/enums.rs:5:5
[INFO] [stderr]   |
[INFO] [stderr] 5 |     V6,
[INFO] [stderr]   |     ^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]   --> src/enums.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     V4(u8, u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V6`
[INFO] [stderr]   --> src/enums.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     V6(String),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quit`
[INFO] [stderr]   --> src/enums.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     Quit,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Move`
[INFO] [stderr]   --> src/enums.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Move { x: i32, y: i32 },
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Write`
[INFO] [stderr]   --> src/enums.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     Write(String),
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ChangeColor`
[INFO] [stderr]   --> src/enums.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Some`
[INFO] [stderr]   --> src/enums.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     Some(T), //this are Options in rust; they're used to check if variable is null or not
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]   --> src/enums.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     Penny,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]   --> src/enums.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     Nickel,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]   --> src/enums.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     Dime,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Quarter`
[INFO] [stderr]   --> src/enums.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     Quarter,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `instanceOfEnum`
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `owner`
[INFO] [stderr]  --> src/ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn owner() {
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_length`
[INFO] [stderr]   --> src/ownership.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn calculate_length(s: &String) -> usize {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `first_word`
[INFO] [stderr]   --> src/ownership.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn first_word(s: &String) {
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]  --> src/structs.rs:2:12
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Rectangle {
[INFO] [stderr]   |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `area`
[INFO] [stderr]  --> src/structs.rs:9:8
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn area(&self) -> u32 {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `area`
[INFO] [stderr]   --> src/structs.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn area(rectangle: Rectangle) -> u32 {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `print_area`
[INFO] [stderr]  --> src/implementation.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn print_area(&self) {
[INFO] [stderr]   |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `instanceOfEnum` should have a snake case name
[INFO] [stderr]   --> src/enums.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn instanceOfEnum(coin: Coin) -> u32 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^ help: convert the identifier to snake case: `instance_of_enum`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 24 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rustlang_journey-cf8800dd52d77dde
[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
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "16c5b7bbace1780af5f3ac2035292940bdffaf8adf6f1f27800ebab1b46028d9"`
[INFO] running `"docker" "rm" "-f" "16c5b7bbace1780af5f3ac2035292940bdffaf8adf6f1f27800ebab1b46028d9"`
[INFO] [stdout] 16c5b7bbace1780af5f3ac2035292940bdffaf8adf6f1f27800ebab1b46028d9