[INFO] cloning repository https://github.com/Sarsoo/rusty-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sarsoo/rusty-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSarsoo%2Frusty-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSarsoo%2Frusty-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a7536995ccdb8690172c94eb65a9cf4895fd8a07
[INFO] testing Sarsoo/rusty-playground against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSarsoo%2Frusty-playground" "/workspace/builds/worker-95/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-95/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Sarsoo/rusty-playground on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Sarsoo/rusty-playground
[INFO] finished tweaking git repo https://github.com/Sarsoo/rusty-playground
[INFO] tweaked toml for git repo https://github.com/Sarsoo/rusty-playground written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate git repo https://github.com/Sarsoo/rusty-playground already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1db073f6ccba614eca07bf55a0ed0bd2bf95bcfc5572b8a1fdab72d75268989e
[INFO] running `Command { std: "docker" "start" "-a" "1db073f6ccba614eca07bf55a0ed0bd2bf95bcfc5572b8a1fdab72d75268989e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1db073f6ccba614eca07bf55a0ed0bd2bf95bcfc5572b8a1fdab72d75268989e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1db073f6ccba614eca07bf55a0ed0bd2bf95bcfc5572b8a1fdab72d75268989e", kill_on_drop: false }`
[INFO] [stdout] 1db073f6ccba614eca07bf55a0ed0bd2bf95bcfc5572b8a1fdab72d75268989e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7d3f2849cd5746cb664fbf7114089fdfcc40c6d1632487f7a4959d4b53710a38
[INFO] running `Command { std: "docker" "start" "-a" "7d3f2849cd5746cb664fbf7114089fdfcc40c6d1632487f7a4959d4b53710a38", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling ppv-lite86 v0.2.9
[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 rustyplayground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |     let f = match f {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/structs.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     y: &(impl Euclidean + Display)) // multiple required traits
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:56:50
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |                                                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/collections.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basics`
[INFO] [stdout]   --> src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn basics() { 
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare`
[INFO] [stdout]   --> src/main.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn compare() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loops`
[INFO] [stdout]   --> src/main.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn loops() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vars`
[INFO] [stdout]    --> src/main.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn vars() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returning`
[INFO] [stdout]    --> src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn returning(input: i32) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `strings`
[INFO] [stdout]    --> src/main.rs:135:4
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn strings() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `nullables`
[INFO] [stdout]    --> src/main.rs:159:4
[INFO] [stdout]     |
[INFO] [stdout] 159 | fn nullables() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err`
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn propagate_err() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator`
[INFO] [stdout]    --> src/main.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn propagate_err_operator() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator_shorter`
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn propagate_err_operator_shorter() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dot`
[INFO] [stdout]   --> src/structs.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn dot(&self, other: &Vector3) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_vector3`
[INFO] [stdout]   --> src/structs.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn build_vector3(x: i32, y: i32, z: i32) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_x`
[INFO] [stdout]   --> src/structs.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn update_x(vec: Vector3) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag`
[INFO] [stdout]   --> src/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_long`
[INFO] [stdout]   --> src/structs.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_where`
[INFO] [stdout]   --> src/structs.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `ColourChannel`
[INFO] [stdout]   --> src/structs.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum ColourChannel {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/structs.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     V4(u8, u8, u8, u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: `V6`
[INFO] [stdout]   --> src/structs.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: associated function is never used: `print`
[INFO] [stdout]   --> src/structs.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound`
[INFO] [stdout]  --> src/collections.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn compound() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vectors`
[INFO] [stdout]   --> src/collections.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn vectors() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/iterate.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |         fn new() -> Counter {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.00s
[INFO] running `Command { std: "docker" "inspect" "7d3f2849cd5746cb664fbf7114089fdfcc40c6d1632487f7a4959d4b53710a38", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d3f2849cd5746cb664fbf7114089fdfcc40c6d1632487f7a4959d4b53710a38", kill_on_drop: false }`
[INFO] [stdout] 7d3f2849cd5746cb664fbf7114089fdfcc40c6d1632487f7a4959d4b53710a38
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2cede80e9f027e83a04cf9bf703b1b315cdfc9ae2e20822fae3b5855e02cf040
[INFO] running `Command { std: "docker" "start" "-a" "2cede80e9f027e83a04cf9bf703b1b315cdfc9ae2e20822fae3b5855e02cf040", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustyplayground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |     let f = match f {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/structs.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     y: &(impl Euclidean + Display)) // multiple required traits
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:56:50
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |                                                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/collections.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basics`
[INFO] [stdout]   --> src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn basics() { 
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare`
[INFO] [stdout]   --> src/main.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn compare() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loops`
[INFO] [stdout]   --> src/main.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn loops() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vars`
[INFO] [stdout]    --> src/main.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn vars() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returning`
[INFO] [stdout]    --> src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn returning(input: i32) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `strings`
[INFO] [stdout]    --> src/main.rs:135:4
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn strings() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `nullables`
[INFO] [stdout]    --> src/main.rs:159:4
[INFO] [stdout]     |
[INFO] [stdout] 159 | fn nullables() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err`
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn propagate_err() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator`
[INFO] [stdout]    --> src/main.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn propagate_err_operator() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator_shorter`
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn propagate_err_operator_shorter() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dot`
[INFO] [stdout]   --> src/structs.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn dot(&self, other: &Vector3) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_vector3`
[INFO] [stdout]   --> src/structs.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn build_vector3(x: i32, y: i32, z: i32) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_x`
[INFO] [stdout]   --> src/structs.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn update_x(vec: Vector3) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag`
[INFO] [stdout]   --> src/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_long`
[INFO] [stdout]   --> src/structs.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_where`
[INFO] [stdout]   --> src/structs.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `ColourChannel`
[INFO] [stdout]   --> src/structs.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum ColourChannel {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/structs.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     V4(u8, u8, u8, u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: `V6`
[INFO] [stdout]   --> src/structs.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: associated function is never used: `print`
[INFO] [stdout]   --> src/structs.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound`
[INFO] [stdout]  --> src/collections.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn compound() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vectors`
[INFO] [stdout]   --> src/collections.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn vectors() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/iterate.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |         fn new() -> Counter {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 30 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]    --> src/main.rs:232:9
[INFO] [stdout]     |
[INFO] [stdout] 232 |     use super::*;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/main.rs:231:1
[INFO] [stdout]     |
[INFO] [stdout] 231 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:172:9
[INFO] [stdout]     |
[INFO] [stdout] 172 |     let f = match f {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]    --> src/main.rs:185:9
[INFO] [stdout]     |
[INFO] [stdout] 185 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:49:21
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> src/structs.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 50 |     y: &(impl Euclidean + Display)) // multiple required traits
[INFO] [stdout]    |     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:56:50
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |                                                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/structs.rs:63:30
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/collections.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let v: Vec<i32> = Vec::new();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `basics`
[INFO] [stdout]   --> src/main.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn basics() { 
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compare`
[INFO] [stdout]   --> src/main.rs:68:4
[INFO] [stdout]    |
[INFO] [stdout] 68 | fn compare() {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `loops`
[INFO] [stdout]   --> src/main.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn loops() {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vars`
[INFO] [stdout]    --> src/main.rs:115:4
[INFO] [stdout]     |
[INFO] [stdout] 115 | fn vars() {
[INFO] [stdout]     |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `returning`
[INFO] [stdout]    --> src/main.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn returning(input: i32) -> i32 {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `strings`
[INFO] [stdout]    --> src/main.rs:135:4
[INFO] [stdout]     |
[INFO] [stdout] 135 | fn strings() {
[INFO] [stdout]     |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `nullables`
[INFO] [stdout]    --> src/main.rs:159:4
[INFO] [stdout]     |
[INFO] [stdout] 159 | fn nullables() {
[INFO] [stdout]     |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err`
[INFO] [stdout]    --> src/main.rs:196:4
[INFO] [stdout]     |
[INFO] [stdout] 196 | fn propagate_err() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator`
[INFO] [stdout]    --> src/main.rs:212:4
[INFO] [stdout]     |
[INFO] [stdout] 212 | fn propagate_err_operator() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `propagate_err_operator_shorter`
[INFO] [stdout]    --> src/main.rs:219:4
[INFO] [stdout]     |
[INFO] [stdout] 219 | fn propagate_err_operator_shorter() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `dot`
[INFO] [stdout]   --> src/structs.rs:20:8
[INFO] [stdout]    |
[INFO] [stdout] 20 |     fn dot(&self, other: &Vector3) -> i32 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `build_vector3`
[INFO] [stdout]   --> src/structs.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub fn build_vector3(x: i32, y: i32, z: i32) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `update_x`
[INFO] [stdout]   --> src/structs.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn update_x(vec: Vector3) -> Vector3 {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag`
[INFO] [stdout]   --> src/structs.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_long`
[INFO] [stdout]   --> src/structs.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound_mag_where`
[INFO] [stdout]   --> src/structs.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `ColourChannel`
[INFO] [stdout]   --> src/structs.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum ColourChannel {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `V4`
[INFO] [stdout]   --> src/structs.rs:75:5
[INFO] [stdout]    |
[INFO] [stdout] 75 |     V4(u8, u8, u8, u8),
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: `V6`
[INFO] [stdout]   --> src/structs.rs:76:5
[INFO] [stdout]    |
[INFO] [stdout] 76 |     V6(String),
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/structs.rs:73:10
[INFO] [stdout]    |
[INFO] [stdout] 73 | #[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: associated function is never used: `print`
[INFO] [stdout]   --> src/structs.rs:81:8
[INFO] [stdout]    |
[INFO] [stdout] 81 |     fn print(&self) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compound`
[INFO] [stdout]  --> src/collections.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn compound() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `vectors`
[INFO] [stdout]   --> src/collections.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub fn vectors() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]  --> src/iterate.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 |         fn new() -> Counter {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 31 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustyplayground-85d3bfb9c838c403)
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rustyplayground-ec7098d643ac224a)
[INFO] [stderr]   Executable tests/add_tests.rs (/opt/rustwide/target/debug/deps/add_tests-fba034ede30d34d3)
[INFO] running `Command { std: "docker" "inspect" "2cede80e9f027e83a04cf9bf703b1b315cdfc9ae2e20822fae3b5855e02cf040", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2cede80e9f027e83a04cf9bf703b1b315cdfc9ae2e20822fae3b5855e02cf040", kill_on_drop: false }`
[INFO] [stdout] 2cede80e9f027e83a04cf9bf703b1b315cdfc9ae2e20822fae3b5855e02cf040
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d793cb5ed5110ad85e7a64a08d4b9ed6266c15ffda9aa4609a2b2c40af20714a
[INFO] running `Command { std: "docker" "start" "-a" "d793cb5ed5110ad85e7a64a08d4b9ed6266c15ffda9aa4609a2b2c40af20714a", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/main.rs:172:9
[INFO] [stderr]     |
[INFO] [stderr] 172 |     let f = match f {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]    --> src/main.rs:185:9
[INFO] [stderr]     |
[INFO] [stderr] 185 |     let f = File::open("hello.txt").unwrap_or_else(|error| {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/structs.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stderr]    |                     ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]   --> src/structs.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     y: &(impl Euclidean + Display)) // multiple required traits
[INFO] [stderr]    |     ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/structs.rs:56:50
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stderr]    |                                                  ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/structs.rs:63:30
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stderr]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]   --> src/collections.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 |     let v: Vec<i32> = Vec::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `basics`
[INFO] [stderr]   --> src/main.rs:32:4
[INFO] [stderr]    |
[INFO] [stderr] 32 | fn basics() { 
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compare`
[INFO] [stderr]   --> src/main.rs:68:4
[INFO] [stderr]    |
[INFO] [stderr] 68 | fn compare() {
[INFO] [stderr]    |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `loops`
[INFO] [stderr]   --> src/main.rs:79:4
[INFO] [stderr]    |
[INFO] [stderr] 79 | fn loops() {
[INFO] [stderr]    |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `vars`
[INFO] [stderr]    --> src/main.rs:115:4
[INFO] [stderr]     |
[INFO] [stderr] 115 | fn vars() {
[INFO] [stderr]     |    ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `returning`
[INFO] [stderr]    --> src/main.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn returning(input: i32) -> i32 {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `strings`
[INFO] [stderr]    --> src/main.rs:135:4
[INFO] [stderr]     |
[INFO] [stderr] 135 | fn strings() {
[INFO] [stderr]     |    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `nullables`
[INFO] [stderr]    --> src/main.rs:159:4
[INFO] [stderr]     |
[INFO] [stderr] 159 | fn nullables() {
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `propagate_err`
[INFO] [stderr]    --> src/main.rs:196:4
[INFO] [stderr]     |
[INFO] [stderr] 196 | fn propagate_err() -> Result<String, io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `propagate_err_operator`
[INFO] [stderr]    --> src/main.rs:212:4
[INFO] [stderr]     |
[INFO] [stderr] 212 | fn propagate_err_operator() -> Result<String, io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `propagate_err_operator_shorter`
[INFO] [stderr]    --> src/main.rs:219:4
[INFO] [stderr]     |
[INFO] [stderr] 219 | fn propagate_err_operator_shorter() -> Result<String, io::Error> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dot`
[INFO] [stderr]   --> src/structs.rs:20:8
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn dot(&self, other: &Vector3) -> i32 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `build_vector3`
[INFO] [stderr]   --> src/structs.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn build_vector3(x: i32, y: i32, z: i32) -> Vector3 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `update_x`
[INFO] [stderr]   --> src/structs.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn update_x(vec: Vector3) -> Vector3 {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compound_mag`
[INFO] [stderr]   --> src/structs.rs:49:8
[INFO] [stderr]    |
[INFO] [stderr] 49 | pub fn compound_mag(x: &impl Euclidean, 
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compound_mag_long`
[INFO] [stderr]   --> src/structs.rs:56:8
[INFO] [stderr]    |
[INFO] [stderr] 56 | pub fn compound_mag_long<T: Euclidean + Display>(x: &T) 
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compound_mag_where`
[INFO] [stderr]   --> src/structs.rs:63:8
[INFO] [stderr]    |
[INFO] [stderr] 63 | pub fn compound_mag_where<T>(x: &T) 
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `ColourChannel`
[INFO] [stderr]   --> src/structs.rs:67:6
[INFO] [stderr]    |
[INFO] [stderr] 67 | enum ColourChannel {
[INFO] [stderr]    |      ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `V4`
[INFO] [stderr]   --> src/structs.rs:75:5
[INFO] [stderr]    |
[INFO] [stderr] 75 |     V4(u8, u8, u8, u8),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/structs.rs:73:10
[INFO] [stderr]    |
[INFO] [stderr] 73 | #[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: `V6`
[INFO] [stderr]   --> src/structs.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     V6(String),
[INFO] [stderr]    |     ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/structs.rs:73:10
[INFO] [stderr]    |
[INFO] [stderr] 73 | #[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: associated function is never used: `print`
[INFO] [stderr]   --> src/structs.rs:81:8
[INFO] [stderr]    |
[INFO] [stderr] 81 |     fn print(&self) {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `compound`
[INFO] [stderr]  --> src/collections.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn compound() {
[INFO] [stderr]   |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `vectors`
[INFO] [stderr]   --> src/collections.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn vectors() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]  --> src/iterate.rs:8:12
[INFO] [stderr]   |
[INFO] [stderr] 8 |         fn new() -> Counter {
[INFO] [stderr]   |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/main.rs:232:9
[INFO] [stderr]     |
[INFO] [stderr] 232 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]    --> src/main.rs:231:1
[INFO] [stderr]     |
[INFO] [stderr] 231 | mod tests {
[INFO] [stderr]     | ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rustyplayground` (bin "rustyplayground") generated 30 warnings
[INFO] [stderr] warning: `rustyplayground` (bin "rustyplayground" test) generated 31 warnings (30 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/rustyplayground-85d3bfb9c838c403)
[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] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rustyplayground-ec7098d643ac224a)
[INFO] [stderr]      Running tests/add_tests.rs (/opt/rustwide/target/debug/deps/add_tests-fba034ede30d34d3)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test tests::test_panic ... ignored
[INFO] [stdout] test tests::test1 ... ok
[INFO] [stdout] test tests::test_result ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test add_test_1 ... ok
[INFO] [stderr]    Doc-tests rustyplayground
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - add (line 12) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.40s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d793cb5ed5110ad85e7a64a08d4b9ed6266c15ffda9aa4609a2b2c40af20714a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d793cb5ed5110ad85e7a64a08d4b9ed6266c15ffda9aa4609a2b2c40af20714a", kill_on_drop: false }`
[INFO] [stdout] d793cb5ed5110ad85e7a64a08d4b9ed6266c15ffda9aa4609a2b2c40af20714a