[INFO] cloning repository https://github.com/Nucleartaxi/raytracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Nucleartaxi/raytracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNucleartaxi%2Fraytracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNucleartaxi%2Fraytracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd55c6235f0da04149e9da29926248451e053ebf
[INFO] testing Nucleartaxi/raytracer 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%2FNucleartaxi%2Fraytracer" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Nucleartaxi/raytracer 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/Nucleartaxi/raytracer
[INFO] finished tweaking git repo https://github.com/Nucleartaxi/raytracer
[INFO] tweaked toml for git repo https://github.com/Nucleartaxi/raytracer written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/Nucleartaxi/raytracer 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 1cf4899798d5f6ffbcc72c0fe2948babb552ab08e87d9613c3137ff98dad5d39
[INFO] running `Command { std: "docker" "start" "-a" "1cf4899798d5f6ffbcc72c0fe2948babb552ab08e87d9613c3137ff98dad5d39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1cf4899798d5f6ffbcc72c0fe2948babb552ab08e87d9613c3137ff98dad5d39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1cf4899798d5f6ffbcc72c0fe2948babb552ab08e87d9613c3137ff98dad5d39", kill_on_drop: false }`
[INFO] [stdout] 1cf4899798d5f6ffbcc72c0fe2948babb552ab08e87d9613c3137ff98dad5d39
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] e06370469042703b2182f0156c50d10f848684cb188f20d717e81d4bbb93db70
[INFO] running `Command { std: "docker" "start" "-a" "e06370469042703b2182f0156c50d10f848684cb188f20d717e81d4bbb93db70", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling deflate v0.8.6
[INFO] [stderr]    Compiling png v0.16.8
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::material`
[INFO] [stdout]  --> src/ray.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use super::material;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |             for s in 0..SAMPLES_PER_PIXEL {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_in`
[INFO] [stdout]   --> src/material.rs:31:23
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn scatter(&self, r_in: &Ray, rec: &HitRecord) -> (bool, Color, Ray) {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_r_in`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_test_image`
[INFO] [stdout]  --> src/image.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn create_test_image(v: &mut Vec<u8>, width: u32, height: u32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_x`
[INFO] [stdout]   --> src/vec3.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub fn set_x(&mut self, x: f64) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_y`
[INFO] [stdout]   --> src/vec3.rs:39:12
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn set_y(&mut self, y: f64) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_z`
[INFO] [stdout]   --> src/vec3.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 |     pub fn set_z(&mut self, z: f64) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `multiply`
[INFO] [stdout]   --> src/vec3.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn multiply(&self, other: &Vec3) -> Vec3 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `divide`
[INFO] [stdout]   --> src/vec3.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn divide(&self, other: &Vec3) -> Vec3 {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `cross`
[INFO] [stdout]   --> src/vec3.rs:76:12
[INFO] [stdout]    |
[INFO] [stdout] 76 |     pub fn cross(&self, other: &Vec3) -> Vec3 {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_random`
[INFO] [stdout]   --> src/vec3.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn new_random() -> Vec3 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `multiply_by`
[INFO] [stdout]   --> src/color.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn multiply_by(&self, x: f64) -> Color {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_empty`
[INFO] [stdout]   --> src/ray.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new_empty() -> Ray {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hit_sphere`
[INFO] [stdout]   --> src/ray.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn hit_sphere(&self, center: vec3::Vec3, radius: f64) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `quadrant`
[INFO] [stdout]   --> src/ray.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn quadrant(&self) -> color::Color { //generates quadrant background based on sign of ray direction
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear`
[INFO] [stdout]   --> src/hittable.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn clear(&mut self) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `degrees_to_radians`
[INFO] [stdout]  --> src/utils.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn degrees_to_radians(degrees: f64) -> f64 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/material.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new(ir: f64) -> Dielectric {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 15.41s
[INFO] running `Command { std: "docker" "inspect" "e06370469042703b2182f0156c50d10f848684cb188f20d717e81d4bbb93db70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e06370469042703b2182f0156c50d10f848684cb188f20d717e81d4bbb93db70", kill_on_drop: false }`
[INFO] [stdout] e06370469042703b2182f0156c50d10f848684cb188f20d717e81d4bbb93db70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--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] 6c1cd689599526c1588a5fb37f61645a879b20893fce4592d9c92a235aee9b17
[INFO] running `Command { std: "docker" "start" "-a" "6c1cd689599526c1588a5fb37f61645a879b20893fce4592d9c92a235aee9b17", kill_on_drop: false }`
[INFO] [stderr]    Compiling raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::material`
[INFO] [stdout]  --> src/ray.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use super::material;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:73:17
[INFO] [stdout]    |
[INFO] [stdout] 73 |             for s in 0..SAMPLES_PER_PIXEL {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r_in`
[INFO] [stdout]   --> src/material.rs:31:23
[INFO] [stdout]    |
[INFO] [stdout] 31 |     fn scatter(&self, r_in: &Ray, rec: &HitRecord) -> (bool, Color, Ray) {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_r_in`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `create_test_image`
[INFO] [stdout]  --> src/image.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn create_test_image(v: &mut Vec<u8>, width: u32, height: u32) {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_random`
[INFO] [stdout]   --> src/vec3.rs:79:12
[INFO] [stdout]    |
[INFO] [stdout] 79 |     pub fn new_random() -> Vec3 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `multiply_by`
[INFO] [stdout]   --> src/color.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn multiply_by(&self, x: f64) -> Color {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_empty`
[INFO] [stdout]   --> src/ray.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn new_empty() -> Ray {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `hit_sphere`
[INFO] [stdout]   --> src/ray.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn hit_sphere(&self, center: vec3::Vec3, radius: f64) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `quadrant`
[INFO] [stdout]   --> src/ray.rs:76:8
[INFO] [stdout]    |
[INFO] [stdout] 76 |     fn quadrant(&self) -> color::Color { //generates quadrant background based on sign of ray direction
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `clear`
[INFO] [stdout]   --> src/hittable.rs:96:12
[INFO] [stdout]    |
[INFO] [stdout] 96 |     pub fn clear(&mut self) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/material.rs:60:12
[INFO] [stdout]    |
[INFO] [stdout] 60 |     pub fn new(ir: f64) -> Dielectric {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `test_write_color`
[INFO] [stdout]   --> src/color.rs:86:8
[INFO] [stdout]    |
[INFO] [stdout] 86 |     fn test_write_color() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 12 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.54s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/raytracer-75b51f4e68fc2150)
[INFO] running `Command { std: "docker" "inspect" "6c1cd689599526c1588a5fb37f61645a879b20893fce4592d9c92a235aee9b17", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c1cd689599526c1588a5fb37f61645a879b20893fce4592d9c92a235aee9b17", kill_on_drop: false }`
[INFO] [stdout] 6c1cd689599526c1588a5fb37f61645a879b20893fce4592d9c92a235aee9b17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e79ee28abe547554b0c326b6ade104a46caf0b4da7a367dee4a6ec6dd58492f5
[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" "e79ee28abe547554b0c326b6ade104a46caf0b4da7a367dee4a6ec6dd58492f5", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `super::material`
[INFO] [stderr]  --> src/ray.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use super::material;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/main.rs:73:17
[INFO] [stderr]    |
[INFO] [stderr] 73 |             for s in 0..SAMPLES_PER_PIXEL {
[INFO] [stderr]    |                 ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r_in`
[INFO] [stderr]   --> src/material.rs:31:23
[INFO] [stderr]    |
[INFO] [stderr] 31 |     fn scatter(&self, r_in: &Ray, rec: &HitRecord) -> (bool, Color, Ray) {
[INFO] [stderr]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_r_in`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `create_test_image`
[INFO] [stderr]  --> src/image.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn create_test_image(v: &mut Vec<u8>, width: u32, height: u32) {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_random`
[INFO] [stderr]   --> src/vec3.rs:79:12
[INFO] [stderr]    |
[INFO] [stderr] 79 |     pub fn new_random() -> Vec3 {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `multiply_by`
[INFO] [stderr]   --> src/color.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |     pub fn multiply_by(&self, x: f64) -> Color {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new_empty`
[INFO] [stderr]   --> src/ray.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn new_empty() -> Ray {
[INFO] [stderr]    |            ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `hit_sphere`
[INFO] [stderr]   --> src/ray.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 |     pub fn hit_sphere(&self, center: vec3::Vec3, radius: f64) -> f64 {
[INFO] [stderr]    |            ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `quadrant`
[INFO] [stderr]   --> src/ray.rs:76:8
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn quadrant(&self) -> color::Color { //generates quadrant background based on sign of ray direction
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `clear`
[INFO] [stderr]   --> src/hittable.rs:96:12
[INFO] [stderr]    |
[INFO] [stderr] 96 |     pub fn clear(&mut self) {
[INFO] [stderr]    |            ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/material.rs:60:12
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn new(ir: f64) -> Dielectric {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_write_color`
[INFO] [stderr]   --> src/color.rs:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 |     fn test_write_color() {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `raytracer` (bin "raytracer" test) generated 12 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/raytracer-75b51f4e68fc2150)
[INFO] [stdout] running 23 tests
[INFO] [stdout] test ray::test::test_at ... ok
[INFO] [stdout] test utils::test::test_clamp ... ok
[INFO] [stdout] test utils::test::test_degrees_to_radians ... ok
[INFO] [stdout] test vec3::test::test_cross ... ok
[INFO] [stdout] test vec3::test::test_divide ... ok
[INFO] [stdout] test vec3::test::test_add ... ok
[INFO] [stdout] test vec3::test::test_dot ... ok
[INFO] [stdout] test vec3::test::test_length ... ok
[INFO] [stdout] test vec3::test::test_length_squared ... ok
[INFO] [stdout] test vec3::test::test_multiply ... ok
[INFO] [stdout] test vec3::test::test_multiply_by ... ok
[INFO] [stdout] test vec3::test::test_new_empty ... ok
[INFO] [stdout] test vec3::test::test_set_x ... ok
[INFO] [stdout] test vec3::test::test_set_y ... ok
[INFO] [stdout] test vec3::test::test_set_z ... ok
[INFO] [stdout] test vec3::test::test_subtract ... ok
[INFO] [stdout] test vec3::test::test_unit_vector ... ok
[INFO] [stdout] test vec3::test::test_x_y_z ... ok
[INFO] [stdout] test color::test::test_multiply_color ... ok
[INFO] [stdout] test vec3::test::test_divide_by ... ok
[INFO] [stdout] test color::test::test_new_empty ... ok
[INFO] [stdout] test vec3::test::test_new ... ok
[INFO] [stdout] test color::test::test_rgb ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 23 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e79ee28abe547554b0c326b6ade104a46caf0b4da7a367dee4a6ec6dd58492f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e79ee28abe547554b0c326b6ade104a46caf0b4da7a367dee4a6ec6dd58492f5", kill_on_drop: false }`
[INFO] [stdout] e79ee28abe547554b0c326b6ade104a46caf0b4da7a367dee4a6ec6dd58492f5