[INFO] updating cached repository https://github.com/jmikkola/weekend_ray_tracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4bcaf892e22c4d25552b7f1fb8199785ff552d86
[INFO] testing jmikkola/weekend_ray_tracer against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmikkola%2Fweekend_ray_tracer" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmikkola/weekend_ray_tracer on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jmikkola/weekend_ray_tracer
[INFO] finished tweaking git repo https://github.com/jmikkola/weekend_ray_tracer
[INFO] tweaked toml for git repo https://github.com/jmikkola/weekend_ray_tracer written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jmikkola/weekend_ray_tracer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e02041d3882a46bf074bd25db83af3e95286b97cba2c150984af3542f5562c3f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e02041d3882a46bf074bd25db83af3e95286b97cba2c150984af3542f5562c3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e02041d3882a46bf074bd25db83af3e95286b97cba2c150984af3542f5562c3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e02041d3882a46bf074bd25db83af3e95286b97cba2c150984af3542f5562c3f", kill_on_drop: false }`
[INFO] [stdout] e02041d3882a46bf074bd25db83af3e95286b97cba2c150984af3542f5562c3f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0a90584f89dd96b4237ec151b4c0710f9394204fdde9f7012e23ea6011da83a4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0a90584f89dd96b4237ec151b4c0710f9394204fdde9f7012e23ea6011da83a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_jitter v0.1.2
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling png v0.14.0
[INFO] [stderr]    Compiling ray_tracer_weekend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:240:23
[INFO] [stdout]     |
[INFO] [stdout] 240 |     hitables: Vec<Box<Hitable>>,
[INFO] [stdout]     |                       ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:398:31
[INFO] [stdout]     |
[INFO] [stdout] 398 |     let mut hitables: Vec<Box<Hitable>> = vec![
[INFO] [stdout]     |                               ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |     let n = 500;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:581:21
[INFO] [stdout]     |
[INFO] [stdout] 581 |                 let p = r.point_at_parameter(2.0);
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]    --> src/main.rs:493:9
[INFO] [stdout]     |
[INFO] [stdout] 493 |     let r = (PI/4.0).cos();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world1`
[INFO] [stdout]    --> src/main.rs:495:9
[INFO] [stdout]     |
[INFO] [stdout] 495 |     let world1 = HitableList{
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_world1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `outward_normal` is never read
[INFO] [stdout]    --> src/main.rs:300:21
[INFO] [stdout]     |
[INFO] [stdout] 300 |                 let mut outward_normal = Vec3::new_uniform(1.0);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ni_over_nt` is never read
[INFO] [stdout]    --> src/main.rs:301:21
[INFO] [stdout]     |
[INFO] [stdout] 301 |                 let mut ni_over_nt = 0.0;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cosine` is never read
[INFO] [stdout]    --> src/main.rs:302:21
[INFO] [stdout]     |
[INFO] [stdout] 302 |                 let mut cosine = 0.0;
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/main.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn add(self, val: f32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `w`
[INFO] [stdout]    --> src/main.rs:337:5
[INFO] [stdout]     |
[INFO] [stdout] 337 |     w: Vec3,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.74s
[INFO] running `Command { std: "docker" "inspect" "0a90584f89dd96b4237ec151b4c0710f9394204fdde9f7012e23ea6011da83a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a90584f89dd96b4237ec151b4c0710f9394204fdde9f7012e23ea6011da83a4", kill_on_drop: false }`
[INFO] [stdout] 0a90584f89dd96b4237ec151b4c0710f9394204fdde9f7012e23ea6011da83a4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c548e8a2da293824e66f4a9bd569de5af42656cfcbccfc6a7d59ef72c24f756
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0c548e8a2da293824e66f4a9bd569de5af42656cfcbccfc6a7d59ef72c24f756", kill_on_drop: false }`
[INFO] [stderr]    Compiling ray_tracer_weekend v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:240:23
[INFO] [stdout]     |
[INFO] [stdout] 240 |     hitables: Vec<Box<Hitable>>,
[INFO] [stdout]     |                       ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:398:31
[INFO] [stdout]     |
[INFO] [stdout] 398 |     let mut hitables: Vec<Box<Hitable>> = vec![
[INFO] [stdout]     |                               ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]    --> src/main.rs:397:9
[INFO] [stdout]     |
[INFO] [stdout] 397 |     let n = 500;
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p`
[INFO] [stdout]    --> src/main.rs:581:21
[INFO] [stdout]     |
[INFO] [stdout] 581 |                 let p = r.point_at_parameter(2.0);
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]    --> src/main.rs:493:9
[INFO] [stdout]     |
[INFO] [stdout] 493 |     let r = (PI/4.0).cos();
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `world1`
[INFO] [stdout]    --> src/main.rs:495:9
[INFO] [stdout]     |
[INFO] [stdout] 495 |     let world1 = HitableList{
[INFO] [stdout]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_world1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `outward_normal` is never read
[INFO] [stdout]    --> src/main.rs:300:21
[INFO] [stdout]     |
[INFO] [stdout] 300 |                 let mut outward_normal = Vec3::new_uniform(1.0);
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ni_over_nt` is never read
[INFO] [stdout]    --> src/main.rs:301:21
[INFO] [stdout]     |
[INFO] [stdout] 301 |                 let mut ni_over_nt = 0.0;
[INFO] [stdout]     |                     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cosine` is never read
[INFO] [stdout]    --> src/main.rs:302:21
[INFO] [stdout]     |
[INFO] [stdout] 302 |                 let mut cosine = 0.0;
[INFO] [stdout]     |                     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `add`
[INFO] [stdout]   --> src/main.rs:51:8
[INFO] [stdout]    |
[INFO] [stdout] 51 |     fn add(self, val: f32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `w`
[INFO] [stdout]    --> src/main.rs:337:5
[INFO] [stdout]     |
[INFO] [stdout] 337 |     w: Vec3,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "0c548e8a2da293824e66f4a9bd569de5af42656cfcbccfc6a7d59ef72c24f756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c548e8a2da293824e66f4a9bd569de5af42656cfcbccfc6a7d59ef72c24f756", kill_on_drop: false }`
[INFO] [stdout] 0c548e8a2da293824e66f4a9bd569de5af42656cfcbccfc6a7d59ef72c24f756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c21b0dfce2dc53254bc42f0e40165eea2ed604466bef8e9040579c169b88aa20
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c21b0dfce2dc53254bc42f0e40165eea2ed604466bef8e9040579c169b88aa20", kill_on_drop: false }`
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:240:23
[INFO] [stderr]     |
[INFO] [stderr] 240 |     hitables: Vec<Box<Hitable>>,
[INFO] [stderr]     |                       ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:398:31
[INFO] [stderr]     |
[INFO] [stderr] 398 |     let mut hitables: Vec<Box<Hitable>> = vec![
[INFO] [stderr]     |                               ^^^^^^^ help: use `dyn`: `dyn Hitable`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/main.rs:397:9
[INFO] [stderr]     |
[INFO] [stderr] 397 |     let n = 500;
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]    --> src/main.rs:581:21
[INFO] [stderr]     |
[INFO] [stderr] 581 |                 let p = r.point_at_parameter(2.0);
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r`
[INFO] [stderr]    --> src/main.rs:493:9
[INFO] [stderr]     |
[INFO] [stderr] 493 |     let r = (PI/4.0).cos();
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `world1`
[INFO] [stderr]    --> src/main.rs:495:9
[INFO] [stderr]     |
[INFO] [stderr] 495 |     let world1 = HitableList{
[INFO] [stderr]     |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_world1`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `outward_normal` is never read
[INFO] [stderr]    --> src/main.rs:300:21
[INFO] [stderr]     |
[INFO] [stderr] 300 |                 let mut outward_normal = Vec3::new_uniform(1.0);
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `ni_over_nt` is never read
[INFO] [stderr]    --> src/main.rs:301:21
[INFO] [stderr]     |
[INFO] [stderr] 301 |                 let mut ni_over_nt = 0.0;
[INFO] [stderr]     |                     ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `cosine` is never read
[INFO] [stderr]    --> src/main.rs:302:21
[INFO] [stderr]     |
[INFO] [stderr] 302 |                 let mut cosine = 0.0;
[INFO] [stderr]     |                     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `add`
[INFO] [stderr]   --> src/main.rs:51:8
[INFO] [stderr]    |
[INFO] [stderr] 51 |     fn add(self, val: f32) -> Self {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `w`
[INFO] [stderr]    --> src/main.rs:337:5
[INFO] [stderr]     |
[INFO] [stderr] 337 |     w: Vec3,
[INFO] [stderr]     |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ray_tracer_weekend-98e2896c807a9f2e
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c21b0dfce2dc53254bc42f0e40165eea2ed604466bef8e9040579c169b88aa20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c21b0dfce2dc53254bc42f0e40165eea2ed604466bef8e9040579c169b88aa20", kill_on_drop: false }`
[INFO] [stdout] c21b0dfce2dc53254bc42f0e40165eea2ed604466bef8e9040579c169b88aa20