[INFO] updating cached repository ehuss/raytracer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ehuss/raytracer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ehuss/raytracer" "work/ex/clippy-test-run/sources/stable/gh/ehuss/raytracer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ehuss/raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ehuss/raytracer" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ehuss/raytracer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ehuss/raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9a88a081dab342da88ba7829283f2a28e14c6274
[INFO] sha for GitHub repo ehuss/raytracer: 9a88a081dab342da88ba7829283f2a28e14c6274
[INFO] validating manifest of ehuss/raytracer on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of ehuss/raytracer on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing ehuss/raytracer
[INFO] finished frobbing ehuss/raytracer
[INFO] frobbed toml for ehuss/raytracer written to work/ex/clippy-test-run/sources/stable/gh/ehuss/raytracer/Cargo.toml
[INFO] started frobbing ehuss/raytracer
[INFO] finished frobbing ehuss/raytracer
[INFO] frobbed toml for ehuss/raytracer written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ehuss/raytracer/Cargo.toml
[INFO] crate ehuss/raytracer has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting ehuss/raytracer against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/ehuss/raytracer:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2589c6f31b472e2c725b68f9fc82e580494f8bd53e67e0858cc3b85f09c8186f
[INFO] running `"docker" "start" "-a" "2589c6f31b472e2c725b68f9fc82e580494f8bd53e67e0858cc3b85f09c8186f"`
[INFO] [stderr]    Compiling quote v0.2.3
[INFO] [stderr]     Checking dylib v0.0.1
[INFO] [stderr]    Compiling minifb v0.9.0
[INFO] [stderr]     Checking clap v2.20.5
[INFO] [stderr]     Checking png v0.6.2
[INFO] [stderr]     Checking x11-dl v2.2.1
[INFO] [stderr]    Compiling syn v0.8.7
[INFO] [stderr]     Checking image v0.12.3
[INFO] [stderr]    Compiling derive-new v0.4.0
[INFO] [stderr]     Checking raytracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:16
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                ^^^^ help: replace it with: `x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:22
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                      ^^^^ help: replace it with: `y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:28
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                            ^^^^ help: replace it with: `z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:16
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                ^^^^ help: replace it with: `x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:22
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                      ^^^^ help: replace it with: `y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/vec3.rs:33:28
[INFO] [stderr]    |
[INFO] [stderr] 33 |         Vec3 { x: x, y: y, z: z }
[INFO] [stderr]    |                            ^^^^ help: replace it with: `z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:131:13
[INFO] [stderr]     |
[INFO] [stderr] 131 |             hitable: hitable,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^ help: replace it with: `hitable`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 132 |             sin_theta: sin_theta,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `sin_theta`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             cos_theta: cos_theta,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cos_theta`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:134:13
[INFO] [stderr]     |
[INFO] [stderr] 134 |             bbox: bbox
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `bbox`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/sphere.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             material: material,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `material`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:38:22
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                      ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:38:25
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                      ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:49:25
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/moving_sphere.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 |             material: material,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `material`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:57:21
[INFO] [stderr]    |
[INFO] [stderr] 57 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] 58 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:67:21
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:68:21
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:131:13
[INFO] [stderr]     |
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |             lower_left_corner: lower_left_corner,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `lower_left_corner`
[INFO] [stderr] 131 |             hitable: hitable,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^ help: replace it with: `hitable`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |             horizontal: horizontal,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `horizontal`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |             vertical: vertical,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `vertical`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |             u: u,
[INFO] [stderr]    |             ^^^^ help: replace it with: `u`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |             v: v,
[INFO] [stderr]    |             ^^^^ help: replace it with: `v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |             w: w,
[INFO] [stderr]    |             ^^^^ help: replace it with: `w`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    --> src/hitable.rs:132:13
[INFO] [stderr]     |
[INFO] [stderr] 132 |             sin_theta: sin_theta,
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/material.rs:161:22
[INFO] [stderr]     |
[INFO] [stderr] 161 |         Dielectric { ref_idx: ref_idx }
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^ help: replace it with: `ref_idx`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `sin_theta`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:133:13
[INFO] [stderr]     |
[INFO] [stderr] 133 |             cos_theta: cos_theta,
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cos_theta`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/hitable.rs:134:13
[INFO] [stderr]     |
[INFO] [stderr] 134 |             bbox: bbox
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `bbox`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/bvh.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |             left: left,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/bvh.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |             right: right,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/texture.rs:65:22
[INFO] [stderr]    |
[INFO] [stderr] 65 |         NoiseTexture{scale: scale}
[INFO] [stderr]    |                      ^^^^^^^^^^^^ help: replace it with: `scale`
[INFO] [stderr]    |
[INFO] [stderr]   --> src/sphere.rs:22:13
[INFO] [stderr]    |
[INFO] [stderr] 22 |             material: material,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `material`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/texture.rs:88:22
[INFO] [stderr]    |
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:37:21
[INFO] [stderr]    |
[INFO] [stderr] 37 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr] 88 |         ImageTexture{img: img, nx: x, ny: y}
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    |                      ^^^^^^^^ help: replace it with: `img`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/texture.rs:102:17
[INFO] [stderr]     |
[INFO] [stderr] 102 |         let mut j = ((1.-v)*self.ny as f64-0.001) as i32;
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:38:22
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                      ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:38:25
[INFO] [stderr]    |
[INFO] [stderr] 38 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:39:21
[INFO] [stderr]    |
[INFO] [stderr] 39 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 103 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let mut c = [0.; 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:146:9
[INFO] [stderr]     |
[INFO] [stderr] 146 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:147:9
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:149:13
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:48:21
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]     |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 149 |     let mut c = [0.; 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:189:13
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]     |
[INFO] [stderr] 189 |     let mut c = [Vec3::zero(); 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]   --> src/sphere.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                      ^
[INFO] [stderr]    |
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |         let u = (x-self.x0)/(self.x1-self.x0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]   --> src/aarect.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let v = (y-self.y0)/(self.y1-self.y0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/sphere.rs:49:25
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 let (u, v) = get_sphere_uv(&((p-self.center)/self.radius));
[INFO] [stderr]    |                         ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr]   --> src/aarect.rs:65:13
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let u = (x-self.x0)/(self.x1-self.x0);
[INFO] [stderr]    |             ^
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    |
[INFO] [stderr]   --> src/sphere.rs:50:21
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] 50 |                 let h = HitRecord::new(temp,
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:66:13
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr] 66 |         let v = (z-self.z0)/(self.z1-self.z0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/aarect.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let u = (y-self.y0)/(self.y1-self.y0);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr] 
[INFO] [stderr]    --> src/aarect.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |         let v = (z-self.z0)/(self.z1-self.z0);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/hbox.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             hlist: hlist
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `hlist`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/onb.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr]   --> src/moving_sphere.rs:36:13
[INFO] [stderr] 23 |         let u = cross(&w, &v);
[INFO] [stderr]    |
[INFO] [stderr]    |             ^
[INFO] [stderr] 36 |             material: material,
[INFO] [stderr]    |
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `material`
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:57:21
[INFO] [stderr]    |
[INFO] [stderr] 57 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:58:21
[INFO] [stderr]    |
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr] 58 |                 let h = HitRecord::new(temp,
[INFO] [stderr]   --> src/core.rs:92:21
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 let r = scene.camera.get_ray(rng, u, v);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:67:21
[INFO] [stderr]    |
[INFO] [stderr] 67 |                 let p = r.point_at_parameter(temp);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/moving_sphere.rs:68:21
[INFO] [stderr]    |
[INFO] [stderr] 68 |                 let h = HitRecord::new(temp,
[INFO] [stderr]    |                     ^
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/output/gui.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             window: window,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `window`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    |
[INFO] [stderr]   --> src/output/gui.rs:26:13
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let g = (color[1] * 255.99) as u32;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/output/gui.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let b = (color[2] * 255.99) as u32;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:60:13
[INFO] [stderr]    |
[INFO] [stderr] 60 |             lower_left_corner: lower_left_corner,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `lower_left_corner`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:61:13
[INFO] [stderr]    |
[INFO] [stderr] 61 |             horizontal: horizontal,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `horizontal`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:62:13
[INFO] [stderr]    |
[INFO] [stderr] 62 |             vertical: vertical,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^ help: replace it with: `vertical`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:63:13
[INFO] [stderr]    |
[INFO] [stderr] 63 |             u: u,
[INFO] [stderr]    |             ^^^^ help: replace it with: `u`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:64:13
[INFO] [stderr]    |
[INFO] [stderr] 64 |             v: v,
[INFO] [stderr]    |             ^^^^ help: replace it with: `v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/camera.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |             w: w,
[INFO] [stderr]    |             ^^^^ help: replace it with: `w`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/material.rs:161:22
[INFO] [stderr]     |
[INFO] [stderr] 161 |         Dielectric { ref_idx: ref_idx }
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^ help: replace it with: `ref_idx`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/bvh.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |             left: left,
[INFO] [stderr]     |             ^^^^^^^^^^ help: replace it with: `left`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/bvh.rs:150:13
[INFO] [stderr]     |
[INFO] [stderr] 150 |             right: right,
[INFO] [stderr]     |             ^^^^^^^^^^^^ help: replace it with: `right`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/texture.rs:65:22
[INFO] [stderr]    |
[INFO] [stderr] 65 |         NoiseTexture{scale: scale}
[INFO] [stderr]    |                      ^^^^^^^^^^^^ help: replace it with: `scale`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/texture.rs:88:22
[INFO] [stderr]    |
[INFO] [stderr] 88 |         ImageTexture{img: img, nx: x, ny: y}
[INFO] [stderr]    |                      ^^^^^^^^ help: replace it with: `img`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/texture.rs:102:17
[INFO] [stderr]     |
[INFO] [stderr] 102 |         let mut j = ((1.-v)*self.ny as f64-0.001) as i32;
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:106:13
[INFO] [stderr]     |
[INFO] [stderr] 106 |     let mut c = [0.; 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:146:9
[INFO] [stderr]     |
[INFO] [stderr] 146 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:147:9
[INFO] [stderr]     |
[INFO] [stderr] 147 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:149:13
[INFO] [stderr]     |
[INFO] [stderr] 149 |     let mut c = [0.; 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:186:9
[INFO] [stderr]     |
[INFO] [stderr] 186 |     let i = p.x.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:187:9
[INFO] [stderr]     |
[INFO] [stderr] 187 |     let j = p.y.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:188:9
[INFO] [stderr]     |
[INFO] [stderr] 188 |     let k = p.z.floor() as usize;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]    --> src/perlin.rs:189:13
[INFO] [stderr]     |
[INFO] [stderr] 189 |     let mut c = [Vec3::zero(); 8];
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:30:13
[INFO] [stderr]    |
[INFO] [stderr] 30 |         let u = (x-self.x0)/(self.x1-self.x0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         let v = (y-self.y0)/(self.y1-self.y0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let u = (x-self.x0)/(self.x1-self.x0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/aarect.rs:66:13
[INFO] [stderr]    |
[INFO] [stderr] 66 |         let v = (z-self.z0)/(self.z1-self.z0);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/aarect.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let u = (y-self.y0)/(self.y1-self.y0);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/aarect.rs:115:13
[INFO] [stderr]     |
[INFO] [stderr] 115 |         let v = (z-self.z0)/(self.z1-self.z0);
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/hbox.rs:29:13
[INFO] [stderr]    |
[INFO] [stderr] 29 |             hlist: hlist
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: replace it with: `hlist`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/onb.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let u = cross(&w, &v);
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/core.rs:92:21
[INFO] [stderr]    |
[INFO] [stderr] 92 |                 let r = scene.camera.get_ray(rng, u, v);
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/output/gui.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             window: window,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^ help: replace it with: `window`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/output/gui.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let g = (color[1] * 255.99) as u32;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/output/gui.rs:27:13
[INFO] [stderr]    |
[INFO] [stderr] 27 |         let b = (color[2] * 255.99) as u32;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:260:15
[INFO] [stderr]     |
[INFO] [stderr] 260 |     Vec3::new((v1.y * v2.z - v1.z * v2.y),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:261:15
[INFO] [stderr]     |
[INFO] [stderr] 261 |               (-(v1.x * v2.z - v1.z * v2.x)),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:262:15
[INFO] [stderr]     |
[INFO] [stderr] 262 |               (v1.x * v2.y - v1.y * v2.x))
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/hitable.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 | /         return self.hitable.hit(rng, &rotated_r, t_min, t_max).map(|mut rec| {
[INFO] [stderr] 149 | |             let mut p = rec.p.clone();
[INFO] [stderr] 150 | |             let mut normal = rec.normal.clone();
[INFO] [stderr] 151 | |             p[0] = self.cos_theta*rec.p[0] + self.sin_theta*rec.p[2];
[INFO] [stderr] ...   |
[INFO] [stderr] 157 | |             rec
[INFO] [stderr] 158 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 148 |         self.hitable.hit(rng, &rotated_r, t_min, t_max).map(|mut rec| {
[INFO] [stderr] 149 |             let mut p = rec.p.clone();
[INFO] [stderr] 150 |             let mut normal = rec.normal.clone();
[INFO] [stderr] 151 |             p[0] = self.cos_theta*rec.p[0] + self.sin_theta*rec.p[2];
[INFO] [stderr] 152 |             p[2] = -self.sin_theta*rec.p[0] + self.cos_theta*rec.p[2];
[INFO] [stderr] 153 |             normal[0] = self.cos_theta*rec.normal[0] + self.sin_theta*rec.normal[2];
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         return result;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |         return sum;
[INFO] [stderr]    |         ^^^^^^^^^^^ help: remove `return` as shown: `sum`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         return self.list[index].random(rng, o);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.list[index].random(rng, o)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         return uvw.local_vec(&random_to_sphere(rng, self.radius, distance_squared));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `uvw.local_vec(&random_to_sphere(rng, self.radius, distance_squared))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     return (u,v);
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `(u,v)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/moving_sphere.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/moving_sphere.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |         return Some(surrounding_box(&box0, &box1));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(surrounding_box(&box0, &box1))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         return Some(ni_over_nt * (uv - n * dt) - n * discriminant.sqrt());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(ni_over_nt * (uv - n * dt) - n * discriminant.sqrt())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     return r0 + (1.0 - r0) * (1.0 - cosine).powi(5);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `r0 + (1.0 - r0) * (1.0 - cosine).powi(5)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         return cosine / PI;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `cosine / PI`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:199:9
[INFO] [stderr]     |
[INFO] [stderr] 199 | /         return Some(ScatterRecord{
[INFO] [stderr] 200 | |             specular_ray: Some(specular_ray),
[INFO] [stderr] 201 | |             attenuation: Vec3::new(1., 1., 1.),
[INFO] [stderr] 202 | |             pdf: None
[INFO] [stderr] 203 | |
[INFO] [stderr] 204 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 199 |         Some(ScatterRecord{
[INFO] [stderr] 200 |             specular_ray: Some(specular_ray),
[INFO] [stderr] 201 |             attenuation: Vec3::new(1., 1., 1.),
[INFO] [stderr] 202 |             pdf: None
[INFO] [stderr] 203 | 
[INFO] [stderr] 204 |         })
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:220:13
[INFO] [stderr]     |
[INFO] [stderr] 220 |             return self.emit.value(u, v, p);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.emit.value(u, v, p)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |             return Vec3::zero();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::zero()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             return Axis::X;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::X`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             return Axis::Y;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::Y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             return Axis::Z;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::Z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         return 2.0 * (a*b + b*c + c*a);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `2.0 * (a*b + b*c + c*a)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         return true;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     return AABB::new(small, big);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `AABB::new(small, big)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/bvh.rs:174:9
[INFO] [stderr]     |
[INFO] [stderr] 174 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/texture.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             return self.odd.value(u, v, p);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.odd.value(u, v, p)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/texture.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |             return self.even.value(u, v, p);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.even.value(u, v, p)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/texture.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     return RF[(PX[i] ^ PY[j] ^ PZ[k]) as usize];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `RF[(PX[i] ^ PY[j] ^ PZ[k]) as usize]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:219:5
[INFO] [stderr]     |
[INFO] [stderr] 219 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:232:5
[INFO] [stderr]     |
[INFO] [stderr] 232 |     return accum.abs();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `accum.abs()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         return random_point - *o;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `random_point - *o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/aarect.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/onb.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         return Onb {axis: [u, v, w]};
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Onb {axis: [u, v, w]}`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     return Vec3::new(x,y,z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x,y,z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     return Vec3::new(x, y, z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x, y, z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |             return cosine/PI;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `cosine/PI`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             return 0.
[INFO] [stderr]    |             ^^^^^^^^^ help: remove `return` as shown: `0.`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         return self.uvw.local_vec(&random_cosine_direction(rng));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.uvw.local_vec(&random_cosine_direction(rng))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return self.hitable.pdf_value(rng, &self.o, direction);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.hitable.pdf_value(rng, &self.o, direction)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         return self.hitable.random(rng, &self.o);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.hitable.random(rng, &self.o)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         return 0.5 * self.pdf0.value(rng, direction) + 0.5 * self.pdf1.value(rng, direction);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `0.5 * self.pdf0.value(rng, direction) + 0.5 * self.pdf1.value(rng, direction)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:87:13
[INFO] [stderr]    |
[INFO] [stderr] 87 |             return self.pdf0.generate(rng);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.pdf0.generate(rng)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |             return self.pdf1.generate(rng);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.pdf1.generate(rng)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     return Vec3::new(x, y, z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x, y, z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/output/buckets.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             return buckets;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `buckets`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/output/buckets.rs:142:13
[INFO] [stderr]     |
[INFO] [stderr] 142 |             return buckets;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `buckets`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:56:1
[INFO] [stderr]    |
[INFO] [stderr] 56 | / macro_rules! perrln {
[INFO] [stderr] 57 | |     ($($arg:tt)*) => ({
[INFO] [stderr] 58 | |         use std::io::{Write, stderr};
[INFO] [stderr] 59 | |         writeln!(&mut stderr(), $($arg)*).ok();
[INFO] [stderr] 60 | |     })
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:260:15
[INFO] [stderr]     |
[INFO] [stderr] 260 |     Vec3::new((v1.y * v2.z - v1.z * v2.y),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:261:15
[INFO] [stderr]     |
[INFO] [stderr] 261 |               (-(v1.x * v2.z - v1.z * v2.x)),
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/vec3.rs:262:15
[INFO] [stderr]     |
[INFO] [stderr] 262 |               (v1.x * v2.y - v1.y * v2.x))
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/hitable.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 | /         return self.hitable.hit(rng, &rotated_r, t_min, t_max).map(|mut rec| {
[INFO] [stderr] 149 | |             let mut p = rec.p.clone();
[INFO] [stderr] 150 | |             let mut normal = rec.normal.clone();
[INFO] [stderr] 151 | |             p[0] = self.cos_theta*rec.p[0] + self.sin_theta*rec.p[2];
[INFO] [stderr] ...   |
[INFO] [stderr] 157 | |             rec
[INFO] [stderr] 158 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 148 |         self.hitable.hit(rng, &rotated_r, t_min, t_max).map(|mut rec| {
[INFO] [stderr] 149 |             let mut p = rec.p.clone();
[INFO] [stderr] 150 |             let mut normal = rec.normal.clone();
[INFO] [stderr] 151 |             p[0] = self.cos_theta*rec.p[0] + self.sin_theta*rec.p[2];
[INFO] [stderr] 152 |             p[2] = -self.sin_theta*rec.p[0] + self.cos_theta*rec.p[2];
[INFO] [stderr] 153 |             normal[0] = self.cos_theta*rec.normal[0] + self.sin_theta*rec.normal[2];
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         return result;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |         return sum;
[INFO] [stderr]    |         ^^^^^^^^^^^ help: remove `return` as shown: `sum`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable_list.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         return self.list[index].random(rng, o);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.list[index].random(rng, o)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:58:9
[INFO] [stderr]    |
[INFO] [stderr] 58 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         return uvw.local_vec(&random_to_sphere(rng, self.radius, distance_squared));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `uvw.local_vec(&random_to_sphere(rng, self.radius, distance_squared))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/sphere.rs:89:5
[INFO] [stderr]    |
[INFO] [stderr] 89 |     return (u,v);
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `(u,v)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/moving_sphere.rs:76:9
[INFO] [stderr]    |
[INFO] [stderr] 76 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/moving_sphere.rs:84:9
[INFO] [stderr]    |
[INFO] [stderr] 84 |         return Some(surrounding_box(&box0, &box1));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(surrounding_box(&box0, &box1))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         return Some(ni_over_nt * (uv - n * dt) - n * discriminant.sqrt());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(ni_over_nt * (uv - n * dt) - n * discriminant.sqrt())`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:30:9
[INFO] [stderr]    |
[INFO] [stderr] 30 |         return None;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/material.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     return r0 + (1.0 - r0) * (1.0 - cosine).powi(5);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `r0 + (1.0 - r0) * (1.0 - cosine).powi(5)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:100:9
[INFO] [stderr]     |
[INFO] [stderr] 100 |         return cosine / PI;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `cosine / PI`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:199:9
[INFO] [stderr]     |
[INFO] [stderr] 199 | /         return Some(ScatterRecord{
[INFO] [stderr] 200 | |             specular_ray: Some(specular_ray),
[INFO] [stderr] 201 | |             attenuation: Vec3::new(1., 1., 1.),
[INFO] [stderr] 202 | |             pdf: None
[INFO] [stderr] 203 | |
[INFO] [stderr] 204 | |         });
[INFO] [stderr]     | |___________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 199 |         Some(ScatterRecord{
[INFO] [stderr] 200 |             specular_ray: Some(specular_ray),
[INFO] [stderr] 201 |             attenuation: Vec3::new(1., 1., 1.),
[INFO] [stderr] 202 |             pdf: None
[INFO] [stderr] 203 | 
[INFO] [stderr] 204 |         })
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:220:13
[INFO] [stderr]     |
[INFO] [stderr] 220 |             return self.emit.value(u, v, p);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.emit.value(u, v, p)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/material.rs:222:13
[INFO] [stderr]     |
[INFO] [stderr] 222 |             return Vec3::zero();
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::zero()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             return Axis::X;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::X`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:45:13
[INFO] [stderr]    |
[INFO] [stderr] 45 |             return Axis::Y;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::Y`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:47:13
[INFO] [stderr]    |
[INFO] [stderr] 47 |             return Axis::Z;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `Axis::Z`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |         return 2.0 * (a*b + b*c + c*a);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `2.0 * (a*b + b*c + c*a)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:79:9
[INFO] [stderr]    |
[INFO] [stderr] 79 |         return true;
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aabb.rs:97:5
[INFO] [stderr]    |
[INFO] [stderr] 97 |     return AABB::new(small, big);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `AABB::new(small, big)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/bvh.rs:174:9
[INFO] [stderr]     |
[INFO] [stderr] 174 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/texture.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             return self.odd.value(u, v, p);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.odd.value(u, v, p)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/texture.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |             return self.even.value(u, v, p);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.even.value(u, v, p)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/texture.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:48:5
[INFO] [stderr]    |
[INFO] [stderr] 48 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:71:5
[INFO] [stderr]    |
[INFO] [stderr] 71 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     return result;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^ help: remove `return` as shown: `result`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/perlin.rs:91:5
[INFO] [stderr]    |
[INFO] [stderr] 91 |     return RF[(PX[i] ^ PY[j] ^ PZ[k]) as usize];
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `RF[(PX[i] ^ PY[j] ^ PZ[k]) as usize]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:175:5
[INFO] [stderr]     |
[INFO] [stderr] 175 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:219:5
[INFO] [stderr]     |
[INFO] [stderr] 219 |     return accum;
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: remove `return` as shown: `accum`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/perlin.rs:232:5
[INFO] [stderr]     |
[INFO] [stderr] 232 |     return accum.abs();
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `accum.abs()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/aarect.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |         return random_point - *o;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `random_point - *o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/aarect.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |         return Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()));
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Some(HitRecord::new(t, u, v, r.point_at_parameter(t), normal, self.material.clone()))`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/onb.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         return Onb {axis: [u, v, w]};
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Onb {axis: [u, v, w]}`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     return Vec3::new(x,y,z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x,y,z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     return Vec3::new(x, y, z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x, y, z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |             return cosine/PI;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `cosine/PI`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:51:13
[INFO] [stderr]    |
[INFO] [stderr] 51 |             return 0.
[INFO] [stderr]    |             ^^^^^^^^^ help: remove `return` as shown: `0.`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         return self.uvw.local_vec(&random_cosine_direction(rng));
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.uvw.local_vec(&random_cosine_direction(rng))`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |         return self.hitable.pdf_value(rng, &self.o, direction);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.hitable.pdf_value(rng, &self.o, direction)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:71:9
[INFO] [stderr]    |
[INFO] [stderr] 71 |         return self.hitable.random(rng, &self.o);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.hitable.random(rng, &self.o)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:83:9
[INFO] [stderr]    |
[INFO] [stderr] 83 |         return 0.5 * self.pdf0.value(rng, direction) + 0.5 * self.pdf1.value(rng, direction);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `0.5 * self.pdf0.value(rng, direction) + 0.5 * self.pdf1.value(rng, direction)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:87:13
[INFO] [stderr]    |
[INFO] [stderr] 87 |             return self.pdf0.generate(rng);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.pdf0.generate(rng)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/pdf.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |             return self.pdf1.generate(rng);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.pdf1.generate(rng)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/core.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     return Vec3::new(x, y, z);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Vec3::new(x, y, z)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/output/buckets.rs:57:13
[INFO] [stderr]    |
[INFO] [stderr] 57 |             return buckets;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `buckets`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/output/buckets.rs:142:13
[INFO] [stderr]     |
[INFO] [stderr] 142 |             return buckets;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^ help: remove `return` as shown: `buckets`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/lib.rs:56:1
[INFO] [stderr]    |
[INFO] [stderr] 56 | / macro_rules! perrln {
[INFO] [stderr] 57 | |     ($($arg:tt)*) => ({
[INFO] [stderr] 58 | |         use std::io::{Write, stderr};
[INFO] [stderr] 59 | |         writeln!(&mut stderr(), $($arg)*).ok();
[INFO] [stderr] 60 | |     })
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `DummyNode`
[INFO] [stderr]   --> src/bvh.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct DummyNode {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/vec3.rs:236:44
[INFO] [stderr]     |
[INFO] [stderr] 236 |     fn as_ref(&self) -> &[T; 3] { unsafe { mem::transmute(self) } }
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^ help: try: `&*(self as *const vec3::Vec3<T> as *const [T; 3])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/vec3.rs:242:18
[INFO] [stderr]     |
[INFO] [stderr] 242 |         unsafe { mem::transmute(self) }
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(self as *mut vec3::Vec3<T> as *mut [T; 3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:106:26
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 let fi = i as f64;
[INFO] [stderr]     |                          ^^^^^^^^ help: try: `f64::from(i)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:108:30
[INFO] [stderr]     |
[INFO] [stderr] 108 |                     let fj = j as f64;
[INFO] [stderr]     |                              ^^^^^^^^ help: try: `f64::from(j)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:110:34
[INFO] [stderr]     |
[INFO] [stderr] 110 |                         let fk = k as f64;
[INFO] [stderr]     |                                  ^^^^^^^^ help: try: `f64::from(k)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:141:26
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let mut origin = r.origin().clone();
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `r.origin()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:142:29
[INFO] [stderr]     |
[INFO] [stderr] 142 |         let mut direction = r.direction().clone();
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `r.direction()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:149:25
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let mut p = rec.p.clone();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try removing the `clone` call: `rec.p`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:150:30
[INFO] [stderr]     |
[INFO] [stderr] 150 |             let mut normal = rec.normal.clone();
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rec.normal`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `hitable_list::HitableList<'a>`
[INFO] [stderr]   --> src/hitable_list.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | /     pub fn new() -> HitableList<'a> {
[INFO] [stderr] 15 | |         HitableList { list: Vec::new() }
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/hitable_list.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |         if self.list.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.list.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/sphere.rs:67:53
[INFO] [stderr]    |
[INFO] [stderr] 67 |         if let Some(hrec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                     ^^^^^^^^^ help: try dereferencing it: `*o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/sphere.rs:67:64
[INFO] [stderr]    |
[INFO] [stderr] 67 |         if let Some(hrec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: try dereferencing it: `*v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (9/7)
[INFO] [stderr]   --> src/camera.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     pub fn new(lookfrom: Vec3<f64>,
[INFO] [stderr] 37 | |                lookat: Vec3<f64>,
[INFO] [stderr] 38 | |                vup: Vec3<f64>,
[INFO] [stderr] 39 | |                vfov: f64,
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |         }
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `util::Rng`
[INFO] [stderr]   --> src/util.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | /     pub fn new() -> Rng {
[INFO] [stderr] 15 | |         Rng { rng: rand::weak_rng() }
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl Default for util::Rng {
[INFO] [stderr] 14 |     fn default() -> Self {
[INFO] [stderr] 15 |         Self::new()
[INFO] [stderr] 16 |     }
[INFO] [stderr] 17 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/bvh.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 | /         let left;
[INFO] [stderr] 136 | |         if min_sah_idx == 0 {
[INFO] [stderr] 137 | |             left = l.remove(0);
[INFO] [stderr] 138 | |         } else {
[INFO] [stderr] 139 | |             left = Box::new(BVHNode::new(rng, l, time0, time1));
[INFO] [stderr] 140 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let left = if min_sah_idx == 0 { l.remove(0) } else { Box::new(BVHNode::new(rng, l, time0, time1)) };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/bvh.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 | /         let right;
[INFO] [stderr] 143 | |         if rest.len() == 1 {
[INFO] [stderr] 144 | |             right = rest.remove(0);
[INFO] [stderr] 145 | |         } else {
[INFO] [stderr] 146 | |             right = Box::new(BVHNode::new(rng, rest, time0, time1));
[INFO] [stderr] 147 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let right = if rest.len() == 1 { rest.remove(0) } else { Box::new(BVHNode::new(rng, rest, time0, time1)) };`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `boxes`.
[INFO] [stderr]    --> src/bvh.rs:104:18
[INFO] [stderr]     |
[INFO] [stderr] 104 |         for i in 1..n-1 {
[INFO] [stderr]     |                  ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 104 |         for <item> in boxes.iter().take(n-1).skip(1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:101:24
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut i = (u*self.nx as f64) as i32;
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^ help: try: `f64::from(self.nx)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:102:29
[INFO] [stderr]     |
[INFO] [stderr] 102 |         let mut j = ((1.-v)*self.ny as f64-0.001) as i32;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^ help: try: `f64::from(self.ny)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:26
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                          ^^^^^^^^^^^ help: try: `f64::from(p[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:44
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                                            ^^^^^^^^^^^ help: try: `f64::from(p[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:62
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                                                              ^^^^^^^^^^^ help: try: `f64::from(p[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `result`
[INFO] [stderr]   --> src/perlin.rs:43:14
[INFO] [stderr]    |
[INFO] [stderr] 43 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 43 |     for (i, <item>) in result.iter_mut().enumerate() {
[INFO] [stderr]    |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this looks like you are swapping elements of `p` manually
[INFO] [stderr]   --> src/perlin.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | /         let tmp = p[i];
[INFO] [stderr] 56 | |         p[i] = p[target];
[INFO] [stderr] 57 | |         p[target] = tmp;
[INFO] [stderr]    | |_______________________^ help: try: `p.swap(i, target)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_swap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_swap
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `result`.
[INFO] [stderr]   --> src/perlin.rs:64:14
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for <item> in &mut result {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `result`.
[INFO] [stderr]   --> src/perlin.rs:77:14
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for <item> in &mut result {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/perlin.rs:225:22
[INFO] [stderr]     |
[INFO] [stderr] 225 |     let mut temp_p = p.clone();
[INFO] [stderr]     |                      ^^^^^^^^^ help: try dereferencing it: `*p`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/aarect.rs:77:52
[INFO] [stderr]    |
[INFO] [stderr] 77 |         if let Some(rec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                    ^^^^^^^^^ help: try dereferencing it: `*o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/aarect.rs:77:63
[INFO] [stderr]    |
[INFO] [stderr] 77 |         if let Some(rec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                               ^^^^^^^^^ help: try dereferencing it: `*v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `onb::Onb`
[INFO] [stderr]   --> src/onb.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | /     pub fn new() -> Onb {
[INFO] [stderr] 10 | |         Onb {
[INFO] [stderr] 11 | |             axis: [Vec3::zero(), Vec3::zero(), Vec3::zero()]
[INFO] [stderr] 12 | |         }
[INFO] [stderr] 13 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 4  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/onb.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 | /         let a;
[INFO] [stderr] 17 | |         if w.x.abs() > 0.9 {
[INFO] [stderr] 18 | |             a = Vec3::new(0., 1., 0.);
[INFO] [stderr] 19 | |         } else {
[INFO] [stderr] 20 | |             a = Vec3::new(1., 0., 0.);
[INFO] [stderr] 21 | |         }
[INFO] [stderr]    | |_________^ help: it is more idiomatic to write: `let a = if w.x.abs() > 0.9 { Vec3::new(0., 1., 0.) } else { Vec3::new(1., 0., 0.) };`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/core.rs:54:72
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn render(scene: &Scene, output_settings: &OutputSettings, output: &mut Box<Output>) -> output::Result<()> {
[INFO] [stderr]    |                                                                        ^^^^^^^^^^^^^^^^ help: try: `&mut Output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/core.rs:73:26
[INFO] [stderr]    |
[INFO] [stderr] 73 |                  output: &mut Box<Output>,
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^ help: try: `&mut Output`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:90:26
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 let u = (i as f64 + rng.rand64()) / width as f64;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(i)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:90:53
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 let u = (i as f64 + rng.rand64()) / width as f64;
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^ help: try: `f64::from(width)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:91:26
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let v = (j as f64 + rng.rand64()) / height as f64;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(j)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:91:53
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let v = (j as f64 + rng.rand64()) / height as f64;
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^ help: try: `f64::from(height)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:96:20
[INFO] [stderr]    |
[INFO] [stderr] 96 |             col /= ns as f64;
[INFO] [stderr]    |                    ^^^^^^^^^ help: try: `f64::from(ns)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `new` usually return `Self`
[INFO] [stderr]   --> src/output/image.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new(settings: &OutputSettings, scene: &Scene) -> Result<ImageOutput8> {
[INFO] [stderr] 18 | |         Ok(ImageOutput{
[INFO] [stderr] 19 | |             buf: image::ImageBuffer::new(settings.width, settings.height),
[INFO] [stderr] 20 | |             path: path_from_template(&settings.filename_template, scene),
[INFO] [stderr] 21 | |         })
[INFO] [stderr] 22 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_ret_no_self)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_ret_no_self
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/output/mod.rs:19:55
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn put_bucket(&mut self, bucket: &Bucket, pixels: &Vec<Vec<Vec3<f64>>>) -> Result<()> {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<Vec3<f64>>]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |         camera: camera,
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: replace it with: `camera`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `DummyNode`
[INFO] [stderr]   --> src/bvh.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | struct DummyNode {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]    --> src/main.rs:115:9
[INFO] [stderr]     |
[INFO] [stderr] 115 |         camera: camera,
[INFO] [stderr]     |         ^^^^^^^^^^^^^^ help: replace it with: `camera`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/vec3.rs:236:44
[INFO] [stderr]     |
[INFO] [stderr] 236 |     fn as_ref(&self) -> &[T; 3] { unsafe { mem::transmute(self) } }
[INFO] [stderr]     |                                            ^^^^^^^^^^^^^^^^^^^^ help: try: `&*(self as *const vec3::Vec3<T> as *const [T; 3])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::transmute_ptr_to_ptr)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: transmute from a reference to a reference
[INFO] [stderr]    --> src/vec3.rs:242:18
[INFO] [stderr]     |
[INFO] [stderr] 242 |         unsafe { mem::transmute(self) }
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: try: `&mut *(self as *mut vec3::Vec3<T> as *mut [T; 3])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#transmute_ptr_to_ptr
[INFO] [stderr] 
[INFO] [stderr] warning: needlessly taken reference of both operands
[INFO] [stderr]    --> src/vec3.rs:288:20
[INFO] [stderr]     |
[INFO] [stderr] 288 |         assert_eq!(&a + &b, Vec3::new(1.0, 2.0, 3.0));
[INFO] [stderr]     |                    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 288 |         assert_eq!(a + b, Vec3::new(1.0, 2.0, 3.0));
[INFO] [stderr]     |                    ^   ^
[INFO] [stderr] 
[INFO] [stderr] warning: needlessly taken reference of both operands
[INFO] [stderr]    --> src/vec3.rs:289:20
[INFO] [stderr]     |
[INFO] [stderr] 289 |         assert_eq!(&b + &b, Vec3::new(2.0, 4.0, 6.0));
[INFO] [stderr]     |                    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 289 |         assert_eq!(b + b, Vec3::new(2.0, 4.0, 6.0));
[INFO] [stderr]     |                    ^   ^
[INFO] [stderr] 
[INFO] [stderr] warning: needlessly taken reference of both operands
[INFO] [stderr]    --> src/vec3.rs:305:20
[INFO] [stderr]     |
[INFO] [stderr] 305 |         assert_eq!(&b - &a, Vec3::new(0.0, 1.0, 2.0));
[INFO] [stderr]     |                    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] help: use the values directly
[INFO] [stderr]     |
[INFO] [stderr] 305 |         assert_eq!(b - a, Vec3::new(0.0, 1.0, 2.0));
[INFO] [stderr]     |                    ^   ^
[INFO] [stderr] 
[INFO] [stderr] error: equal expressions as operands to `-`
[INFO] [stderr]    --> src/vec3.rs:306:20
[INFO] [stderr]     |
[INFO] [stderr] 306 |         assert_eq!(&b - &b, Vec3::new(0.0, 0.0, 0.0));
[INFO] [stderr]     |                    ^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::eq_op)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#eq_op
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]    --> src/vec3.rs:349:9
[INFO] [stderr]     |
[INFO] [stderr] 349 |         assert_eq!(dot(&a, &b), 32.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::float_cmp)] on by default
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]    --> src/vec3.rs:349:9
[INFO] [stderr]     |
[INFO] [stderr] 349 |         assert_eq!(dot(&a, &b), 32.0);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#float_cmp
[INFO] [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:106:26
[INFO] [stderr]     |
[INFO] [stderr] 106 |                 let fi = i as f64;
[INFO] [stderr]     |                          ^^^^^^^^ help: try: `f64::from(i)`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:108:30
[INFO] [stderr]     |
[INFO] [stderr] 108 |                     let fj = j as f64;
[INFO] [stderr]     |                              ^^^^^^^^ help: try: `f64::from(j)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/hitable.rs:110:34
[INFO] [stderr]     |
[INFO] [stderr] 110 |                         let fk = k as f64;
[INFO] [stderr]     |                                  ^^^^^^^^ help: try: `f64::from(k)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:141:26
[INFO] [stderr]     |
[INFO] [stderr] 141 |         let mut origin = r.origin().clone();
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `r.origin()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:142:29
[INFO] [stderr]     |
[INFO] [stderr] 142 |         let mut direction = r.direction().clone();
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `r.direction()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:149:25
[INFO] [stderr]     |
[INFO] [stderr] 149 |             let mut p = rec.p.clone();
[INFO] [stderr]     |                         ^^^^^^^^^^^^^ help: try removing the `clone` call: `rec.p`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/hitable.rs:150:30
[INFO] [stderr]     |
[INFO] [stderr] 150 |             let mut normal = rec.normal.clone();
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `rec.normal`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `hitable_list::HitableList<'a>`
[INFO] [stderr]   --> src/hitable_list.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | /     pub fn new() -> HitableList<'a> {
[INFO] [stderr] 15 | |         HitableList { list: Vec::new() }
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 8  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/hitable_list.rs:36:12
[INFO] [stderr]    |
[INFO] [stderr] 36 |         if self.list.len() == 0 {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.list.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/sphere.rs:67:53
[INFO] [stderr]    |
[INFO] [stderr] 67 |         if let Some(hrec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                     ^^^^^^^^^ help: try dereferencing it: `*o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/sphere.rs:67:64
[INFO] [stderr]    |
[INFO] [stderr] 67 |         if let Some(hrec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                                ^^^^^^^^^ help: try dereferencing it: `*v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: this function has too many arguments (9/7)
[INFO] [stderr]   --> src/camera.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     pub fn new(lookfrom: Vec3<f64>,
[INFO] [stderr] 37 | |                lookat: Vec3<f64>,
[INFO] [stderr] 38 | |                vup: Vec3<f64>,
[INFO] [stderr] 39 | |                vfov: f64,
[INFO] [stderr] ...  |
[INFO] [stderr] 69 | |         }
[INFO] [stderr] 70 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::too_many_arguments)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_many_arguments
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `util::Rng`
[INFO] [stderr]   --> src/util.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 | /     pub fn new() -> Rng {
[INFO] [stderr] 15 | |         Rng { rng: rand::weak_rng() }
[INFO] [stderr] 16 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl Default for util::Rng {
[INFO] [stderr] 14 |     fn default() -> Self {
[INFO] [stderr] 15 |         Self::new()
[INFO] [stderr] 16 |     }
[INFO] [stderr] 17 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/bvh.rs:135:9
[INFO] [stderr]     |
[INFO] [stderr] 135 | /         let left;
[INFO] [stderr] 136 | |         if min_sah_idx == 0 {
[INFO] [stderr] 137 | |             left = l.remove(0);
[INFO] [stderr] 138 | |         } else {
[INFO] [stderr] 139 | |             left = Box::new(BVHNode::new(rng, l, time0, time1));
[INFO] [stderr] 140 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let left = if min_sah_idx == 0 { l.remove(0) } else { Box::new(BVHNode::new(rng, l, time0, time1)) };`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::useless_let_if_seq)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]    --> src/bvh.rs:142:9
[INFO] [stderr]     |
[INFO] [stderr] 142 | /         let right;
[INFO] [stderr] 143 | |         if rest.len() == 1 {
[INFO] [stderr] 144 | |             right = rest.remove(0);
[INFO] [stderr] 145 | |         } else {
[INFO] [stderr] 146 | |             right = Box::new(BVHNode::new(rng, rest, time0, time1));
[INFO] [stderr] 147 | |         }
[INFO] [stderr]     | |_________^ help: it is more idiomatic to write: `let right = if rest.len() == 1 { rest.remove(0) } else { Box::new(BVHNode::new(rng, rest, time0, time1)) };`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `boxes`.
[INFO] [stderr]    --> src/bvh.rs:104:18
[INFO] [stderr]     |
[INFO] [stderr] 104 |         for i in 1..n-1 {
[INFO] [stderr]     |                  ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 104 |         for <item> in boxes.iter().take(n-1).skip(1) {
[INFO] [stderr]     |             ^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:101:24
[INFO] [stderr]     |
[INFO] [stderr] 101 |         let mut i = (u*self.nx as f64) as i32;
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^ help: try: `f64::from(self.nx)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:102:29
[INFO] [stderr]     |
[INFO] [stderr] 102 |         let mut j = ((1.-v)*self.ny as f64-0.001) as i32;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^ help: try: `f64::from(self.ny)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:26
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                          ^^^^^^^^^^^ help: try: `f64::from(p[0])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:44
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                                            ^^^^^^^^^^^ help: try: `f64::from(p[1])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/texture.rs:110:62
[INFO] [stderr]     |
[INFO] [stderr] 110 |         return Vec3::new(p[0] as f64/255., p[1] as f64/255., p[2] as f64/255.);
[INFO] [stderr]     |                                                              ^^^^^^^^^^^ help: try: `f64::from(p[2])`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is used to index `result`
[INFO] [stderr]   --> src/perlin.rs:43:14
[INFO] [stderr]    |
[INFO] [stderr] 43 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 43 |     for (i, <item>) in result.iter_mut().enumerate() {
[INFO] [stderr]    |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this looks like you are swapping elements of `p` manually
[INFO] [stderr]   --> src/perlin.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 | /         let tmp = p[i];
[INFO] [stderr] 56 | |         p[i] = p[target];
[INFO] [stderr] 57 | |         p[target] = tmp;
[INFO] [stderr]    | |_______________________^ help: try: `p.swap(i, target)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::manual_swap)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_swap
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `result`.
[INFO] [stderr]   --> src/perlin.rs:64:14
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 64 |     for <item> in &mut result {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `result`.
[INFO] [stderr]   --> src/perlin.rs:77:14
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for i in 0..256 {
[INFO] [stderr]    |              ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for <item> in &mut result {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/perlin.rs:225:22
[INFO] [stderr]     |
[INFO] [stderr] 225 |     let mut temp_p = p.clone();
[INFO] [stderr]     |                      ^^^^^^^^^ help: try dereferencing it: `*p`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/aarect.rs:77:52
[INFO] [stderr]    |
[INFO] [stderr] 77 |         if let Some(rec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                    ^^^^^^^^^ help: try dereferencing it: `*o`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/aarect.rs:77:63
[INFO] [stderr]    |
[INFO] [stderr] 77 |         if let Some(rec) = self.hit(rng, &Ray::new(o.clone(), v.clone()), 0.001, f64::MAX) {
[INFO] [stderr]    |                                                               ^^^^^^^^^ help: try dereferencing it: `*v`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `onb::Onb`
[INFO] [stderr]   --> src/onb.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | /     pub fn new() -> Onb {
[INFO] [stderr] 10 | |         Onb {
[INFO] [stderr] 11 | |             axis: [Vec3::zero(), Vec3::zero(), Vec3::zero()]
[INFO] [stderr] 12 | |         }
[INFO] [stderr] 13 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 4  | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: `if _ { .. } else { .. }` is an expression
[INFO] [stderr]   --> src/onb.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 | /         let a;
[INFO] [stderr] 17 | |         if w.x.abs() > 0.9 {
[INFO] [stderr] 18 | |             a = Vec3::new(0., 1., 0.);
[INFO] [stderr] 19 | |         } else {
[INFO] [stderr] 20 | |             a = Vec3::new(1., 0., 0.);
[INFO] [stderr] 21 | |         }
[INFO] [stderr]    | |_________^ help: it is more idiomatic to write: `let a = if w.x.abs() > 0.9 { Vec3::new(0., 1., 0.) } else { Vec3::new(1., 0., 0.) };`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_let_if_seq
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/core.rs:54:72
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub fn render(scene: &Scene, output_settings: &OutputSettings, output: &mut Box<Output>) -> output::Result<()> {
[INFO] [stderr]    |                                                                        ^^^^^^^^^^^^^^^^ help: try: `&mut Output`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::borrowed_box)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use `&Box<T>`. Consider using just `&T`
[INFO] [stderr]   --> src/core.rs:73:26
[INFO] [stderr]    |
[INFO] [stderr] 73 |                  output: &mut Box<Output>,
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^^ help: try: `&mut Output`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#borrowed_box
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:90:26
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 let u = (i as f64 + rng.rand64()) / width as f64;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(i)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:90:53
[INFO] [stderr]    |
[INFO] [stderr] 90 |                 let u = (i as f64 + rng.rand64()) / width as f64;
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^ help: try: `f64::from(width)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:91:26
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let v = (j as f64 + rng.rand64()) / height as f64;
[INFO] [stderr]    |                          ^^^^^^^^ help: try: `f64::from(j)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:91:53
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let v = (j as f64 + rng.rand64()) / height as f64;
[INFO] [stderr]    |                                                     ^^^^^^^^^^^^^ help: try: `f64::from(height)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/core.rs:96:20
[INFO] [stderr]    |
[INFO] [stderr] 96 |             col /= ns as f64;
[INFO] [stderr]    |                    ^^^^^^^^^ help: try: `f64::from(ns)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: methods called `new` usually return `Self`
[INFO] [stderr]   --> src/output/image.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | /     pub fn new(settings: &OutputSettings, scene: &Scene) -> Result<ImageOutput8> {
[INFO] [stderr] 18 | |         Ok(ImageOutput{
[INFO] [stderr] 19 | |             buf: image::ImageBuffer::new(settings.width, settings.height),
[INFO] [stderr] 20 | |             path: path_from_template(&settings.filename_template, scene),
[INFO] [stderr] 21 | |         })
[INFO] [stderr] 22 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_ret_no_self)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_ret_no_self
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/output/mod.rs:19:55
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn put_bucket(&mut self, bucket: &Bucket, pixels: &Vec<Vec<Vec3<f64>>>) -> Result<()> {
[INFO] [stderr]    |                                                       ^^^^^^^^^^^^^^^^^^^^ help: change this to: `&[Vec<Vec3<f64>>]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `raytracer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/bench_perlin.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `raytracer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> benches/bench_hit.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `raytracer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 | /     return Scene {
[INFO] [stderr] 113 | |         world: Box::new(list),
[INFO] [stderr] 114 | |         light_shapes: Box::new(light_shapes),
[INFO] [stderr] 115 | |         camera: camera,
[INFO] [stderr] 116 | |         output_settings: output,
[INFO] [stderr] 117 | |         num_samples: 100,
[INFO] [stderr] 118 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 112 |     Scene {
[INFO] [stderr] 113 |         world: Box::new(list),
[INFO] [stderr] 114 |         light_shapes: Box::new(light_shapes),
[INFO] [stderr] 115 |         camera: camera,
[INFO] [stderr] 116 |         output_settings: output,
[INFO] [stderr] 117 |         num_samples: 100,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:98:30
[INFO] [stderr]    |
[INFO] [stderr] 98 |                              nx as f64 / ny as f64, // aspect
[INFO] [stderr]    |                              ^^^^^^^^^ help: try: `f64::from(nx)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |                              nx as f64 / ny as f64, // aspect
[INFO] [stderr]    |                                          ^^^^^^^^^ help: try: `f64::from(ny)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/main.rs:112:5
[INFO] [stderr]     |
[INFO] [stderr] 112 | /     return Scene {
[INFO] [stderr] 113 | |         world: Box::new(list),
[INFO] [stderr] 114 | |         light_shapes: Box::new(light_shapes),
[INFO] [stderr] 115 | |         camera: camera,
[INFO] [stderr] 116 | |         output_settings: output,
[INFO] [stderr] 117 | |         num_samples: 100,
[INFO] [stderr] 118 | |     }
[INFO] [stderr]     | |_____^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 112 |     Scene {
[INFO] [stderr] 113 |         world: Box::new(list),
[INFO] [stderr] 114 |         light_shapes: Box::new(light_shapes),
[INFO] [stderr] 115 |         camera: camera,
[INFO] [stderr] 116 |         output_settings: output,
[INFO] [stderr] 117 |         num_samples: 100,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:98:30
[INFO] [stderr]    |
[INFO] [stderr] 98 |                              nx as f64 / ny as f64, // aspect
[INFO] [stderr]    |                              ^^^^^^^^^ help: try: `f64::from(nx)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:98:42
[INFO] [stderr]    |
[INFO] [stderr] 98 |                              nx as f64 / ny as f64, // aspect
[INFO] [stderr]    |                                          ^^^^^^^^^ help: try: `f64::from(ny)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2589c6f31b472e2c725b68f9fc82e580494f8bd53e67e0858cc3b85f09c8186f"`
[INFO] running `"docker" "rm" "-f" "2589c6f31b472e2c725b68f9fc82e580494f8bd53e67e0858cc3b85f09c8186f"`
[INFO] [stdout] 2589c6f31b472e2c725b68f9fc82e580494f8bd53e67e0858cc3b85f09c8186f