[INFO] updating cached repository jay-tyler/rust_toy_raytracer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jay-tyler/rust_toy_raytracer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jay-tyler/rust_toy_raytracer" "work/ex/clippy-test-run/sources/stable/gh/jay-tyler/rust_toy_raytracer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/jay-tyler/rust_toy_raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jay-tyler/rust_toy_raytracer" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jay-tyler/rust_toy_raytracer"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jay-tyler/rust_toy_raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0d513f7aa2732c3248e89421b72675fe95ec76cb
[INFO] sha for GitHub repo jay-tyler/rust_toy_raytracer: 0d513f7aa2732c3248e89421b72675fe95ec76cb
[INFO] validating manifest of jay-tyler/rust_toy_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 jay-tyler/rust_toy_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 jay-tyler/rust_toy_raytracer
[INFO] finished frobbing jay-tyler/rust_toy_raytracer
[INFO] frobbed toml for jay-tyler/rust_toy_raytracer written to work/ex/clippy-test-run/sources/stable/gh/jay-tyler/rust_toy_raytracer/Cargo.toml
[INFO] started frobbing jay-tyler/rust_toy_raytracer
[INFO] finished frobbing jay-tyler/rust_toy_raytracer
[INFO] frobbed toml for jay-tyler/rust_toy_raytracer written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jay-tyler/rust_toy_raytracer/Cargo.toml
[INFO] crate jay-tyler/rust_toy_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 jay-tyler/rust_toy_raytracer against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/jay-tyler/rust_toy_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] c93870d2624bb6ee85a48ed47d4209361a90e4a22550e03728ede812eec71b58
[INFO] running `"docker" "start" "-a" "c93870d2624bb6ee85a48ed47d4209361a90e4a22550e03728ede812eec71b58"`
[INFO] [stderr]     Checking ray_tracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |         return hit_anything;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `hit_anything`
[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] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/camera.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         return Ray{
[INFO] [stderr] 14 | |             origin: self.origin,
[INFO] [stderr] 15 | |             direction: self.lower_left_corner + self.horizontal * u + self.vertical * v - self.origin,
[INFO] [stderr] 16 | |         };
[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] 13 |         Ray{
[INFO] [stderr] 14 |             origin: self.origin,
[INFO] [stderr] 15 |             direction: self.lower_left_corner + self.horizontal * u + self.vertical * v - self.origin,
[INFO] [stderr] 16 |         }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/hitable.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |         return hit_anything;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `hit_anything`
[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] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/camera.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 | /         return Ray{
[INFO] [stderr] 14 | |             origin: self.origin,
[INFO] [stderr] 15 | |             direction: self.lower_left_corner + self.horizontal * u + self.vertical * v - self.origin,
[INFO] [stderr] 16 | |         };
[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] 13 |         Ray{
[INFO] [stderr] 14 |             origin: self.origin,
[INFO] [stderr] 15 |             direction: self.lower_left_corner + self.horizontal * u + self.vertical * v - self.origin,
[INFO] [stderr] 16 |         }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         assert_eq!(v1.0, 1.);
[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/lib.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |         assert_eq!(v1.0, 1.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |         assert_eq!(vsum.0, 6.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |         assert_eq!(vsum.0, 6.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         assert_eq!(vsum.1, 9.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |         assert_eq!(vsum.1, 9.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         assert_eq!(vsum.2, 11.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 |         assert_eq!(vsum.2, 11.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         assert_eq!(vdiff.0, 4.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:34:9
[INFO] [stderr]    |
[INFO] [stderr] 34 |         assert_eq!(vdiff.0, 4.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         assert_eq!(vdiff.1, 5.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:35:9
[INFO] [stderr]    |
[INFO] [stderr] 35 |         assert_eq!(vdiff.1, 5.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         assert_eq!(vdiff.2, 5.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         assert_eq!(vdiff.2, 5.);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         assert_eq!(vdiff.0, -0.5);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         assert_eq!(vdiff.0, -0.5);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         assert_eq!(vdiff.1, 0.5);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         assert_eq!(vdiff.1, 0.5);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         assert_eq!(vdiff.2, 1.5);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         assert_eq!(vdiff.2, 1.5);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 |         assert_eq!(vdot, 43. as f64);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 |         assert_eq!(vdot, 43. as f64);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]   --> src/lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         assert_eq!(v.magnitude(), expected);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]   --> src/lib.rs:75:9
[INFO] [stderr]    |
[INFO] [stderr] 75 |         assert_eq!(v.magnitude(), expected);
[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] error: strict comparison of f32 or f64
[INFO] [stderr]    --> src/lib.rs:162:9
[INFO] [stderr]     |
[INFO] [stderr] 162 |         assert_eq!(h.t, 4.5_f64);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] note: std::f32::EPSILON and std::f64::EPSILON are available.
[INFO] [stderr]    --> src/lib.rs:162:9
[INFO] [stderr]     |
[INFO] [stderr] 162 |         assert_eq!(h.t, 4.5_f64);
[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] error: aborting due to 13 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `ray_tracer`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `ray_tracer::rays::Ray`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use ray_tracer::rays::Ray;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         return ThreeVector(
[INFO] [stderr] 18 | |             rec.normal.0 + 1.,
[INFO] [stderr] 19 | |             rec.normal.1 + 1.,
[INFO] [stderr] 20 | |             rec.normal.2 + 1.,
[INFO] [stderr] 21 | |         ) * 0.5;
[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] 17 |         ThreeVector(
[INFO] [stderr] 18 |             rec.normal.0 + 1.,
[INFO] [stderr] 19 |             rec.normal.1 + 1.,
[INFO] [stderr] 20 |             rec.normal.2 + 1.,
[INFO] [stderr] 21 |         ) * 0.5
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         return ThreeVector(1.0, 1.0, 1.0) * (1.0 - t) +
[INFO] [stderr] 26 | |                ThreeVector(0.5, 0.7, 1.0) * t;
[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] 25 |         ThreeVector(1.0, 1.0, 1.0) * (1.0 - t) +
[INFO] [stderr] 26 |                ThreeVector(0.5, 0.7, 1.0) * t
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `lower_left_corner`
[INFO] [stderr]   --> src/main.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let lower_left_corner = ray_tracer::vectors::ThreeVector(-2.,-1., -1.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: consider using `_lower_left_corner` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `horizontal`
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let horizontal = ray_tracer::vectors::ThreeVector(4., 0., 0.);
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_horizontal` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vertical`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let vertical = ray_tracer::vectors::ThreeVector(0.,2., 0.);
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_vertical` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let origin = ray_tracer::vectors::ThreeVector(0.,0.,0.);
[INFO] [stderr]    |         ^^^^^^ help: consider using `_origin` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                     let p = r.point_at_parameter(2.0);
[INFO] [stderr]    |                         ^ help: consider using `_p` instead
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `array`.
[INFO] [stderr]   --> src/main.rs:32:14
[INFO] [stderr]    |
[INFO] [stderr] 32 |     for i in 0..100 {
[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] 32 |     for <item> in &mut array {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `ray_tracer::rays::Ray`
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use ray_tracer::rays::Ray;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 17 | /         return ThreeVector(
[INFO] [stderr] 18 | |             rec.normal.0 + 1.,
[INFO] [stderr] 19 | |             rec.normal.1 + 1.,
[INFO] [stderr] 20 | |             rec.normal.2 + 1.,
[INFO] [stderr] 21 | |         ) * 0.5;
[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] 17 |         ThreeVector(
[INFO] [stderr] 18 |             rec.normal.0 + 1.,
[INFO] [stderr] 19 |             rec.normal.1 + 1.,
[INFO] [stderr] 20 |             rec.normal.2 + 1.,
[INFO] [stderr] 21 |         ) * 0.5
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:25:9
[INFO] [stderr]    |
[INFO] [stderr] 25 | /         return ThreeVector(1.0, 1.0, 1.0) * (1.0 - t) +
[INFO] [stderr] 26 | |                ThreeVector(0.5, 0.7, 1.0) * t;
[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] 25 |         ThreeVector(1.0, 1.0, 1.0) * (1.0 - t) +
[INFO] [stderr] 26 |                ThreeVector(0.5, 0.7, 1.0) * t
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:26
[INFO] [stderr]    |
[INFO] [stderr] 68 |                     u = (i as f64 + u) / nx 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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |                     u = (i as f64 + u) / nx as f64;
[INFO] [stderr]    |                                          ^^^^^^^^^ help: try: `f64::from(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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     v = (j as f64 + v) / ny 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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:69:42
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     v = (j as f64 + v) / ny as f64;
[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: unused variable: `lower_left_corner`
[INFO] [stderr]   --> src/main.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let lower_left_corner = ray_tracer::vectors::ThreeVector(-2.,-1., -1.);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^ help: consider using `_lower_left_corner` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `horizontal`
[INFO] [stderr]   --> src/main.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let horizontal = ray_tracer::vectors::ThreeVector(4., 0., 0.);
[INFO] [stderr]    |         ^^^^^^^^^^ help: consider using `_horizontal` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `vertical`
[INFO] [stderr]   --> src/main.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |     let vertical = ray_tracer::vectors::ThreeVector(0.,2., 0.);
[INFO] [stderr]    |         ^^^^^^^^ help: consider using `_vertical` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `origin`
[INFO] [stderr]   --> src/main.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |     let origin = ray_tracer::vectors::ThreeVector(0.,0.,0.);
[INFO] [stderr]    |         ^^^^^^ help: consider using `_origin` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:71:25
[INFO] [stderr]    |
[INFO] [stderr] 71 |                     let p = r.point_at_parameter(2.0);
[INFO] [stderr]    |                         ^ help: consider using `_p` instead
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `i` is only used to index `array`.
[INFO] [stderr]   --> src/main.rs:32:14
[INFO] [stderr]    |
[INFO] [stderr] 32 |     for i in 0..100 {
[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] 32 |     for <item> in &mut array {
[INFO] [stderr]    |         ^^^^^^    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: casting i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:26
[INFO] [stderr]    |
[INFO] [stderr] 68 |                     u = (i as f64 + u) / nx 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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:68:42
[INFO] [stderr]    |
[INFO] [stderr] 68 |                     u = (i as f64 + u) / nx as f64;
[INFO] [stderr]    |                                          ^^^^^^^^^ help: try: `f64::from(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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:69:26
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     v = (j as f64 + v) / ny 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 i32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:69:42
[INFO] [stderr]    |
[INFO] [stderr] 69 |                     v = (j as f64 + v) / ny as f64;
[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" "c93870d2624bb6ee85a48ed47d4209361a90e4a22550e03728ede812eec71b58"`
[INFO] running `"docker" "rm" "-f" "c93870d2624bb6ee85a48ed47d4209361a90e4a22550e03728ede812eec71b58"`
[INFO] [stdout] c93870d2624bb6ee85a48ed47d4209361a90e4a22550e03728ede812eec71b58