[INFO] cloning repository https://github.com/Swiftaff/rust_ray_tracer_challenge
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Swiftaff/rust_ray_tracer_challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSwiftaff%2Frust_ray_tracer_challenge"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSwiftaff%2Frust_ray_tracer_challenge'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 71592766a14f26b0c7b8613276cbc977b60d83b2
[INFO] checking Swiftaff/rust_ray_tracer_challenge against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSwiftaff%2Frust_ray_tracer_challenge" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Swiftaff/rust_ray_tracer_challenge on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Swiftaff/rust_ray_tracer_challenge
[INFO] finished tweaking git repo https://github.com/Swiftaff/rust_ray_tracer_challenge
[INFO] tweaked toml for git repo https://github.com/Swiftaff/rust_ray_tracer_challenge written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Swiftaff/rust_ray_tracer_challenge already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 264decfb2737aa031626325b35195bdbfce587c761c05417259b663c672a5f9f
[INFO] running `"docker" "start" "-a" "264decfb2737aa031626325b35195bdbfce587c761c05417259b663c672a5f9f"`
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking rust_ray_tracer_challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `crate::matrices`
[INFO] [stderr]  --> src/intersections.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::matrices;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::lights`
[INFO] [stderr]  --> src/materials.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use crate::lights;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/sphere_lighting.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::matrices`
[INFO] [stderr]   --> src/sphere_lighting.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::matrices;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::transformations`
[INFO] [stderr]   --> src/sphere_lighting.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use crate::transformations;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/spheres.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::transformations`
[INFO] [stderr]  --> src/spheres.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use crate::transformations;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/transformations.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::transformations`
[INFO] [stderr]  --> src/transformations.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::transformations;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::matrices`
[INFO] [stderr]  --> src/worlds.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::matrices;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/sphere_lighting.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 Err(e) => {} //println!("Error: {}", e),
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/sphere_lighting.rs:60:29
[INFO] [stderr]    |
[INFO] [stderr] 60 |                         Err(e) => {} //println!("Error: {}", e),
[INFO] [stderr]    |                             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/spheres.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn discriminant(s: Sphere, ray: rays::Ray) -> Discriminant {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/worlds.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 |             Err(e) => (), //println!("XS Error: {}", e),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/worlds.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         Err(e) => tuples::COLOR_BLACK,
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pixel_get`
[INFO] [stderr]   --> src/canvas.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn pixel_get(canvas: PixelCanvas, x: u32, y: u32) -> tuples::Color {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `comp_default`
[INFO] [stderr]  --> src/intersections.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn comp_default() -> Comps {
[INFO] [stderr]   |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prepare_computations`
[INFO] [stderr]   --> src/intersections.rs:61:8
[INFO] [stderr]    |
[INFO] [stderr] 61 | pub fn prepare_computations(i: Intersection, r: rays::Ray) -> Comps {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `material`
[INFO] [stderr]   --> src/materials.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn material(
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_m2`
[INFO] [stderr]   --> src/matrices.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn get_m2(m: Matrix2, y: usize, x: usize) -> f64 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_m3`
[INFO] [stderr]   --> src/matrices.rs:36:8
[INFO] [stderr]    |
[INFO] [stderr] 36 | pub fn get_m3(m: Matrix3, y: usize, x: usize) -> f64 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_m4`
[INFO] [stderr]   --> src/matrices.rs:39:8
[INFO] [stderr]    |
[INFO] [stderr] 39 | pub fn get_m4(m: Matrix4, y: usize, x: usize) -> f64 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_equal_m4`
[INFO] [stderr]   --> src/matrices.rs:43:8
[INFO] [stderr]    |
[INFO] [stderr] 43 | pub fn get_bool_equal_m4(m1: Matrix4, m2: Matrix4) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_equal_m3`
[INFO] [stderr]   --> src/matrices.rs:57:8
[INFO] [stderr]    |
[INFO] [stderr] 57 | pub fn get_bool_equal_m3(m1: Matrix3, m2: Matrix3) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_equal_m2`
[INFO] [stderr]   --> src/matrices.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn get_bool_equal_m2(m1: Matrix2, m2: Matrix2) -> bool {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_matrix3_is_invertible`
[INFO] [stderr]   --> src/matrices.rs:89:4
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn get_bool_matrix3_is_invertible(m: Matrix3) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_matrix2_is_invertible`
[INFO] [stderr]   --> src/matrices.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn get_bool_matrix2_is_invertible(m: Matrix2) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_multiply`
[INFO] [stderr]   --> src/matrices.rs:97:8
[INFO] [stderr]    |
[INFO] [stderr] 97 | pub fn matrix4_multiply(m1: Matrix4, m2: Matrix4) -> Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix3_multiply`
[INFO] [stderr]    --> src/matrices.rs:219:8
[INFO] [stderr]     |
[INFO] [stderr] 219 | pub fn matrix3_multiply(m1: Matrix3, m2: Matrix3) -> Matrix3 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `set_transform`
[INFO] [stderr]   --> src/spheres.rs:34:8
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub fn set_transform(mut s: Sphere, t: matrices::Matrix4) -> Sphere {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_translation`
[INFO] [stderr]  --> src/transformations.rs:7:8
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub fn matrix4_translation(x: f64, y: f64, z: f64) -> matrices::Matrix4 {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_scaling`
[INFO] [stderr]   --> src/transformations.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn matrix4_scaling(x: f64, y: f64, z: f64) -> matrices::Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_rotation_x_rad`
[INFO] [stderr]   --> src/transformations.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn matrix4_rotation_x_rad(r: f64) -> matrices::Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_rotation_y_rad`
[INFO] [stderr]   --> src/transformations.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn matrix4_rotation_y_rad(r: f64) -> matrices::Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_rotation_z_rad`
[INFO] [stderr]   --> src/transformations.rs:50:8
[INFO] [stderr]    |
[INFO] [stderr] 50 | pub fn matrix4_rotation_z_rad(r: f64) -> matrices::Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix4_shearing`
[INFO] [stderr]   --> src/transformations.rs:59:8
[INFO] [stderr]    |
[INFO] [stderr] 59 | pub fn matrix4_shearing(xy: f64, xz: f64, yx: f64, yz: f64, zx: f64, zy: f64) -> matrices::Matrix4 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `view_transform`
[INFO] [stderr]   --> src/transformations.rs:70:8
[INFO] [stderr]    |
[INFO] [stderr] 70 | pub fn view_transform(
[INFO] [stderr]    |        ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `COLOR_RED`
[INFO] [stderr]   --> src/tuples.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | / pub const COLOR_RED: Color = Color {
[INFO] [stderr] 21 | |     red: ONE,
[INFO] [stderr] 22 | |     green: ZERO,
[INFO] [stderr] 23 | |     blue: ZERO,
[INFO] [stderr] 24 | | };
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `projectile`
[INFO] [stderr]    --> src/tuples.rs:100:8
[INFO] [stderr]     |
[INFO] [stderr] 100 | pub fn projectile(position: Point, velocity: Vector) -> Projectile {
[INFO] [stderr]     |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `environment`
[INFO] [stderr]    --> src/tuples.rs:107:8
[INFO] [stderr]     |
[INFO] [stderr] 107 | pub fn environment(gravity: Vector, wind: Vector) -> Environment {
[INFO] [stderr]     |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tick`
[INFO] [stderr]    --> src/tuples.rs:134:8
[INFO] [stderr]     |
[INFO] [stderr] 134 | pub fn tick(env: &Environment, proj: &Projectile) -> Projectile {
[INFO] [stderr]     |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `world`
[INFO] [stderr]   --> src/worlds.rs:16:8
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub fn world() -> World {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `world_default`
[INFO] [stderr]   --> src/worlds.rs:23:8
[INFO] [stderr]    |
[INFO] [stderr] 23 | pub fn world_default() -> World {
[INFO] [stderr]    |        ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `world_intersect`
[INFO] [stderr]   --> src/worlds.rs:45:8
[INFO] [stderr]    |
[INFO] [stderr] 45 | pub fn world_intersect(w: World, r: rays::Ray) -> Vec<intersections::Intersection> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `shade_hit`
[INFO] [stderr]   --> src/worlds.rs:60:8
[INFO] [stderr]    |
[INFO] [stderr] 60 | pub fn shade_hit(w: World, c: intersections::Comps) -> tuples::Color {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `color_at`
[INFO] [stderr]   --> src/worlds.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn color_at(w: World, r: rays::Ray) -> tuples::Color {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `theHit` should have a snake case name
[INFO] [stderr]   --> src/intersections.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut theHit: i32 = -1;
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `the_hit`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `canvas_pixels` should have an upper case name
[INFO] [stderr]   --> src/sphere_lighting.rs:19:11
[INFO] [stderr]    |
[INFO] [stderr] 19 |     const canvas_pixels: u32 = 400;
[INFO] [stderr]    |           ^^^^^^^^^^^^^ help: convert the identifier to upper case: `CANVAS_PIXELS`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::f64::consts::PI`
[INFO] [stderr]  --> src/sphere_lighting.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::f64::consts::PI;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::matrices`
[INFO] [stderr]   --> src/sphere_lighting.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use crate::matrices;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::transformations`
[INFO] [stderr]   --> src/sphere_lighting.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use crate::transformations;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::transformations`
[INFO] [stderr]  --> src/transformations.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use crate::transformations;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/sphere_lighting.rs:56:21
[INFO] [stderr]    |
[INFO] [stderr] 56 |                 Err(e) => {} //println!("Error: {}", e),
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/sphere_lighting.rs:60:29
[INFO] [stderr]    |
[INFO] [stderr] 60 |                         Err(e) => {} //println!("Error: {}", e),
[INFO] [stderr]    |                             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/spheres.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 | pub fn discriminant(s: Sphere, ray: rays::Ray) -> Discriminant {
[INFO] [stderr]    |                     ^ help: consider prefixing with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `xs`
[INFO] [stderr]    --> src/spheres.rs:156:16
[INFO] [stderr]     |
[INFO] [stderr] 156 |             Ok(xs) => {
[INFO] [stderr]     |                ^^ help: consider prefixing with an underscore: `_xs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `xs`
[INFO] [stderr]    --> src/spheres.rs:259:16
[INFO] [stderr]     |
[INFO] [stderr] 259 |             Ok(xs) => {
[INFO] [stderr]     |                ^^ help: consider prefixing with an underscore: `_xs`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/spheres.rs:317:13
[INFO] [stderr]     |
[INFO] [stderr] 317 |         let n = normal_at(
[INFO] [stderr]     |             ^ help: consider prefixing with an underscore: `_n`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/worlds.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 |             Err(e) => (), //println!("XS Error: {}", e),
[INFO] [stderr]    |                 ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `e`
[INFO] [stderr]   --> src/worlds.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         Err(e) => tuples::COLOR_BLACK,
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_e`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pixel_get`
[INFO] [stderr]   --> src/canvas.rs:38:4
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn pixel_get(canvas: PixelCanvas, x: u32, y: u32) -> tuples::Color {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `material`
[INFO] [stderr]   --> src/materials.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn material(
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_matrix3_is_invertible`
[INFO] [stderr]   --> src/matrices.rs:89:4
[INFO] [stderr]    |
[INFO] [stderr] 89 | fn get_bool_matrix3_is_invertible(m: Matrix3) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_bool_matrix2_is_invertible`
[INFO] [stderr]   --> src/matrices.rs:93:4
[INFO] [stderr]    |
[INFO] [stderr] 93 | fn get_bool_matrix2_is_invertible(m: Matrix2) -> bool {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `matrix3_multiply`
[INFO] [stderr]    --> src/matrices.rs:219:8
[INFO] [stderr]     |
[INFO] [stderr] 219 | pub fn matrix3_multiply(m1: Matrix3, m2: Matrix3) -> Matrix3 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `COLOR_RED`
[INFO] [stderr]   --> src/tuples.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | / pub const COLOR_RED: Color = Color {
[INFO] [stderr] 21 | |     red: ONE,
[INFO] [stderr] 22 | |     green: ZERO,
[INFO] [stderr] 23 | |     blue: ZERO,
[INFO] [stderr] 24 | | };
[INFO] [stderr]    | |__^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `theHit` should have a snake case name
[INFO] [stderr]   --> src/intersections.rs:48:13
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let mut theHit: i32 = -1;
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `the_hit`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `canvas_pixels` should have an upper case name
[INFO] [stderr]   --> src/sphere_lighting.rs:19:11
[INFO] [stderr]    |
[INFO] [stderr] 19 |     const canvas_pixels: u32 = 400;
[INFO] [stderr]    |           ^^^^^^^^^^^^^ help: convert the identifier to upper case: `CANVAS_PIXELS`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_upper_case_globals)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.48s
[INFO] running `"docker" "inspect" "264decfb2737aa031626325b35195bdbfce587c761c05417259b663c672a5f9f"`
[INFO] running `"docker" "rm" "-f" "264decfb2737aa031626325b35195bdbfce587c761c05417259b663c672a5f9f"`
[INFO] [stdout] 264decfb2737aa031626325b35195bdbfce587c761c05417259b663c672a5f9f