[INFO] cloning repository https://github.com/rwmorton/rust_raytracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rwmorton/rust_raytracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwmorton%2Frust_raytracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwmorton%2Frust_raytracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1746765767b8906f87be0bade9e9ae61642a22cf
[INFO] checking rwmorton/rust_raytracer against try#dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e for pr-153721
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frwmorton%2Frust_raytracer" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/rwmorton/rust_raytracer
[INFO] finished tweaking git repo https://github.com/rwmorton/rust_raytracer
[INFO] tweaked toml for git repo https://github.com/rwmorton/rust_raytracer written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/rwmorton/rust_raytracer on toolchain dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/rwmorton/rust_raytracer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "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-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321
[INFO] running `Command { std: "docker" "start" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321" "/opt/rustwide/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321" "/opt/rustwide/cargo-home/bin/cargo" "+dcc22e5232dd0dbe95a4b3ab84c8d24a0880771e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.8
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling sdl2 v0.32.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling sdl2-sys v0.32.6
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking num v0.1.42
[INFO] [stderr]     Checking rust_raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `vector::Vector`
[INFO] [stdout]  --> src/scene/world.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vector::Vector,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `vector::Vector`
[INFO] [stdout]  --> src/scene/plane.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     vector::Vector,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TextureCreator` and `Texture`
[INFO] [stdout]  --> src/view/window.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |     render::{Canvas,TextureCreator,Texture},
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^ ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/view/window.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TextureCreator` and `Texture`
[INFO] [stdout]  --> src/view/window.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |     render::{Canvas,TextureCreator,Texture},
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^ ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> src/view/window.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/math/ray.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn at(&self,t: f64) -> Point {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/view/window.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut s_radius = 0.5;
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/view/window.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let mut sphere = Sphere::new(s_radius,s_center);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/view/window.rs:140:33
[INFO] [stdout]     |
[INFO] [stdout] 140 | ...                   let mut v = x - s_center;
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/view/window.rs:126:17
[INFO] [stdout]     |
[INFO] [stdout] 126 |             let color: Color = Color::new(0.,0.,0.,1.).unwrap();
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/image/film.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let mut fx = 2.0 / (self.width as f64);
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/image/film.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut fy = 2.0 / (self.height as f64);
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `X_AXIS` is never used
[INFO] [stdout]   --> src/math/vector.rs:23:11
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub const X_AXIS: Vector = Vector{x: 1.0,y: 0.0,z: 0.0};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `Y_AXIS` is never used
[INFO] [stdout]   --> src/math/vector.rs:24:11
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub const Y_AXIS: Vector = Vector{x: 0.0,y: 1.0,z: 0.0};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `Z_AXIS` is never used
[INFO] [stdout]   --> src/math/vector.rs:25:11
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub const Z_AXIS: Vector = Vector{x: 0.0,y: 0.0,z: 1.0};
[INFO] [stdout]    |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `distance_sq` and `distance` are never used
[INFO] [stdout]   --> src/math/point.rs:80:12
[INFO] [stdout]    |
[INFO] [stdout] 73 | impl Point {
[INFO] [stdout]    | ---------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |     pub fn distance_sq(self,p: Point) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 85 |     pub fn distance(self,p: Point) -> f64 {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Matrix` is never constructed
[INFO] [stdout]   --> src/math/matrix.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Matrix {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `IDENTITY` is never used
[INFO] [stdout]   --> src/math/matrix.rs:27:11
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub const IDENTITY: Matrix = Matrix {
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `at`, `set`, `get_row`, `get_row_as_vector`, and `transpose` are never used
[INFO] [stdout]    --> src/math/matrix.rs:166:12
[INFO] [stdout]     |
[INFO] [stdout] 165 | impl Matrix {
[INFO] [stdout]     | ----------- associated items in this implementation
[INFO] [stdout] 166 |     pub fn new() -> Matrix {
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 178 |     pub fn at(&self,i: usize,j: usize) -> Result<f64,String> {
[INFO] [stdout]     |            ^^
[INFO] [stdout] ...
[INFO] [stdout] 187 |     pub fn set
[INFO] [stdout]     |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 218 |     pub fn get_row(&self,i: usize) -> (f64,f64,f64,f64) {
[INFO] [stdout]     |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 229 |     pub fn get_row_as_vector(&self,i: usize) -> Vector {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 238 |     pub fn transpose(&self) -> Matrix {
[INFO] [stdout]     |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `at` is never used
[INFO] [stdout]   --> src/math/ray.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Ray {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn at(&self,t: f64) -> Point {
[INFO] [stdout]    |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Len` is never used
[INFO] [stdout]  --> src/math/traits.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Len {
[INFO] [stdout]   |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `LenSq` is never used
[INFO] [stdout]  --> src/math/traits.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait LenSq {
[INFO] [stdout]   |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Cross` is never used
[INFO] [stdout]   --> src/math/traits.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub trait Cross<Rhs> {
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Normalize` is never used
[INFO] [stdout]   --> src/math/traits.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub trait Normalize {
[INFO] [stdout]    |           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]    --> src/view/window.rs:179:8
[INFO] [stdout]     |
[INFO] [stdout]  34 | impl<'a> Window<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn update(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `WHITE` is never used
[INFO] [stdout]   --> src/image/color.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 | pub const WHITE: Color = Color{r: 1.0,g: 1.0,b: 1.0,a: 1.0};
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `RED` is never used
[INFO] [stdout]   --> src/image/color.rs:20:11
[INFO] [stdout]    |
[INFO] [stdout] 20 | pub const RED  : Color = Color{r: 1.0,g: 0.0,b: 0.0,a: 1.0};
[INFO] [stdout]    |           ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `GREEN` is never used
[INFO] [stdout]   --> src/image/color.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub const GREEN: Color = Color{r: 0.0,g: 1.0,b: 0.0,a: 1.0};
[INFO] [stdout]    |           ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `BLUE` is never used
[INFO] [stdout]   --> src/image/color.rs:22:11
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub const BLUE : Color = Color{r: 0.0,g: 0.0,b: 1.0,a: 1.0};
[INFO] [stdout]    |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SPEED` should have a snake case name
[INFO] [stdout]   --> src/view/window.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut SPEED = 0.1;
[INFO] [stdout]    |                 ^^^^^ help: convert the identifier to snake case: `speed`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/view/window.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 | ...                   self.film.write_pixel(i as usize,j as usize,hit_color);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 144 |                             let _ = self.film.write_pixel(i as usize,j as usize,hit_color);
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/view/window.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             self.canvas.copy(&texture,None,None);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 153 |             let _ = self.canvas.copy(&texture,None,None);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/math/ray.rs:35:21
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub fn at(&self,t: f64) -> Point {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/view/window.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut s_radius = 0.5;
[INFO] [stdout]    |             ----^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/view/window.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |         let mut sphere = Sphere::new(s_radius,s_center);
[INFO] [stdout]    |             ----^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/view/window.rs:140:33
[INFO] [stdout]     |
[INFO] [stdout] 140 | ...                   let mut v = x - s_center;
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/view/window.rs:126:17
[INFO] [stdout]     |
[INFO] [stdout] 126 |             let color: Color = Color::new(0.,0.,0.,1.).unwrap();
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/image/film.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         let mut fx = 2.0 / (self.width as f64);
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/image/film.rs:71:13
[INFO] [stdout]    |
[INFO] [stdout] 71 |         let mut fy = 2.0 / (self.height as f64);
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/image/film.rs:131:13
[INFO] [stdout]     |
[INFO] [stdout] 131 |         let mut color: Color = Color::new(1.,0.,0.,1.).unwrap();
[INFO] [stdout]     |             ----^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `at` is never used
[INFO] [stdout]   --> src/math/ray.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl Ray {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 35 |     pub fn at(&self,t: f64) -> Point {
[INFO] [stdout]    |            ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_at` is never used
[INFO] [stdout]   --> src/math/ray.rs:66:8
[INFO] [stdout]    |
[INFO] [stdout] 66 |     fn test_at() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `update` is never used
[INFO] [stdout]    --> src/view/window.rs:179:8
[INFO] [stdout]     |
[INFO] [stdout]  34 | impl<'a> Window<'a> {
[INFO] [stdout]     | ------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 179 |     fn update(&mut self) {
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SPEED` should have a snake case name
[INFO] [stdout]   --> src/view/window.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let mut SPEED = 0.1;
[INFO] [stdout]    |                 ^^^^^ help: convert the identifier to snake case: `speed`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/view/window.rs:144:29
[INFO] [stdout]     |
[INFO] [stdout] 144 | ...                   self.film.write_pixel(i as usize,j as usize,hit_color);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 144 |                             let _ = self.film.write_pixel(i as usize,j as usize,hit_color);
[INFO] [stdout]     |                             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/view/window.rs:153:13
[INFO] [stdout]     |
[INFO] [stdout] 153 |             self.canvas.copy(&texture,None,None);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 153 |             let _ = self.canvas.copy(&texture,None,None);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.53s
[INFO] running `Command { std: "docker" "inspect" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321", kill_on_drop: false }`
[INFO] [stdout] ae6c12bf37ce689ff1d030710222c8808d6ba77b2f393b66377612c45c034321
