[INFO] cloning repository https://github.com/cjschneider2/raytracing-iow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cjschneider2/raytracing-iow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjschneider2%2Fraytracing-iow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjschneider2%2Fraytracing-iow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1a292e6c1eff7cacfb66c3c7d4f07a5087c74457
[INFO] building cjschneider2/raytracing-iow against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcjschneider2%2Fraytracing-iow" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cjschneider2/raytracing-iow on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cjschneider2/raytracing-iow
[INFO] finished tweaking git repo https://github.com/cjschneider2/raytracing-iow
[INFO] tweaked toml for git repo https://github.com/cjschneider2/raytracing-iow written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cjschneider2/raytracing-iow already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9f95f42b72c3bb346549a83435b4f56ce5f59bab404bda708ae78afd3793628f
[INFO] running `Command { std: "docker" "start" "-a" "9f95f42b72c3bb346549a83435b4f56ce5f59bab404bda708ae78afd3793628f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9f95f42b72c3bb346549a83435b4f56ce5f59bab404bda708ae78afd3793628f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f95f42b72c3bb346549a83435b4f56ce5f59bab404bda708ae78afd3793628f", kill_on_drop: false }`
[INFO] [stdout] 9f95f42b72c3bb346549a83435b4f56ce5f59bab404bda708ae78afd3793628f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1636c2a403a934090cfa7efd07869e40983f67e174d65319602bf1481cb3d859
[INFO] running `Command { std: "docker" "start" "-a" "1636c2a403a934090cfa7efd07869e40983f67e174d65319602bf1481cb3d859", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling libc v0.2.8
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling raytracing-iow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/vec3.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         ((self.x * self.x) +
[INFO] [stdout]    |         ^
[INFO] [stdout] 28 |          (self.y * self.y) +
[INFO] [stdout] 29 |          (self.z * self.z))
[INFO] [stdout]    |                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 ~         (self.x * self.x) +
[INFO] [stdout] 28 |          (self.y * self.y) +
[INFO] [stdout] 29 ~          (self.z * self.z)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/vec3.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         ((self.x * other.x) +
[INFO] [stdout]    |         ^
[INFO] [stdout] 46 |          (self.y * other.y) +
[INFO] [stdout] 47 |          (self.z * other.z) )
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 45 ~         (self.x * other.x) +
[INFO] [stdout] 46 |          (self.y * other.y) +
[INFO] [stdout] 47 ~          (self.z * other.z)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `material::Material`
[INFO] [stdout]  --> src/hitable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use material::Material;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `util::rand_in_unit_sphere`
[INFO] [stdout]  --> src/metal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use util::rand_in_unit_sphere;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hit`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use hitable::{Hit, Hitable};
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `metal::Metal`
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use metal::Metal;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `material::Material`
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use material::Material;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ray_in`
[INFO] [stdout]   --> src/lambertian.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |                ray_in: &Ray,
[INFO] [stdout]    |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ray_in`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attenuation`
[INFO] [stdout]   --> src/lambertian.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |                attenuation: &Vec3,
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attenuation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scattered`
[INFO] [stdout]   --> src/lambertian.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |                scattered: &Ray) -> (bool, Ray, Vec3)
[INFO] [stdout]    |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scattered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attenuation`
[INFO] [stdout]   --> src/metal.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 21 |                attenuation: &Vec3,
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attenuation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scattered`
[INFO] [stdout]   --> src/metal.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |                scattered: &Ray) -> (bool, Ray, Vec3)
[INFO] [stdout]    |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scattered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lambert_2`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let lambert_2 = Lambertian::new(Vec3::new(0.8, 0.8, 0.0));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lambert_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `material` is never read
[INFO] [stdout]   --> src/sphere.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Sphere<T, M: Material> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub material: M,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `scatter` is never used
[INFO] [stdout]  --> src/material.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Material {
[INFO] [stdout]   |           -------- method in this trait
[INFO] [stdout] 6 |     fn scatter(
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/metal.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Metal {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn new( _albedo: Vec3) -> Metal {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |             write!(file, "{} {} {}\n", r, g, b);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "1636c2a403a934090cfa7efd07869e40983f67e174d65319602bf1481cb3d859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1636c2a403a934090cfa7efd07869e40983f67e174d65319602bf1481cb3d859", kill_on_drop: false }`
[INFO] [stdout] 1636c2a403a934090cfa7efd07869e40983f67e174d65319602bf1481cb3d859
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail-expr-drop-order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2f206e00adf5a8161ad09657a4ab3fa60ee9cb773089b87f7a278153ea534dd
[INFO] running `Command { std: "docker" "start" "-a" "c2f206e00adf5a8161ad09657a4ab3fa60ee9cb773089b87f7a278153ea534dd", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]    Compiling raytracing-iow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/vec3.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |         ((self.x * self.x) +
[INFO] [stdout]    |         ^
[INFO] [stdout] 28 |          (self.y * self.y) +
[INFO] [stdout] 29 |          (self.z * self.z))
[INFO] [stdout]    |                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 ~         (self.x * self.x) +
[INFO] [stdout] 28 |          (self.y * self.y) +
[INFO] [stdout] 29 ~          (self.z * self.z)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/vec3.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |         ((self.x * other.x) +
[INFO] [stdout]    |         ^
[INFO] [stdout] 46 |          (self.y * other.y) +
[INFO] [stdout] 47 |          (self.z * other.z) )
[INFO] [stdout]    |                            ^^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 45 ~         (self.x * other.x) +
[INFO] [stdout] 46 |          (self.y * other.y) +
[INFO] [stdout] 47 ~          (self.z * other.z)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `material::Material`
[INFO] [stdout]  --> src/hitable.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use material::Material;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `util::rand_in_unit_sphere`
[INFO] [stdout]  --> src/metal.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use util::rand_in_unit_sphere;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Hit`
[INFO] [stdout]   --> src/main.rs:18:15
[INFO] [stdout]    |
[INFO] [stdout] 18 | use hitable::{Hit, Hitable};
[INFO] [stdout]    |               ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `metal::Metal`
[INFO] [stdout]   --> src/main.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 | use metal::Metal;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `material::Material`
[INFO] [stdout]   --> src/main.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | use material::Material;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ray_in`
[INFO] [stdout]   --> src/lambertian.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |                ray_in: &Ray,
[INFO] [stdout]    |                ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ray_in`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attenuation`
[INFO] [stdout]   --> src/lambertian.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |                attenuation: &Vec3,
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attenuation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scattered`
[INFO] [stdout]   --> src/lambertian.rs:23:16
[INFO] [stdout]    |
[INFO] [stdout] 23 |                scattered: &Ray) -> (bool, Ray, Vec3)
[INFO] [stdout]    |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scattered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `attenuation`
[INFO] [stdout]   --> src/metal.rs:21:16
[INFO] [stdout]    |
[INFO] [stdout] 21 |                attenuation: &Vec3,
[INFO] [stdout]    |                ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_attenuation`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `scattered`
[INFO] [stdout]   --> src/metal.rs:22:16
[INFO] [stdout]    |
[INFO] [stdout] 22 |                scattered: &Ray) -> (bool, Ray, Vec3)
[INFO] [stdout]    |                ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_scattered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lambert_2`
[INFO] [stdout]   --> src/main.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let lambert_2 = Lambertian::new(Vec3::new(0.8, 0.8, 0.0));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_lambert_2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `material` is never read
[INFO] [stdout]   --> src/sphere.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 7  | pub struct Sphere<T, M: Material> {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 10 |     pub material: M,
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `scatter` is never used
[INFO] [stdout]  --> src/material.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub trait Material {
[INFO] [stdout]   |           -------- method in this trait
[INFO] [stdout] 6 |     fn scatter(
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/metal.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl Metal {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 12 |     pub fn new( _albedo: Vec3) -> Metal {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:84:13
[INFO] [stdout]    |
[INFO] [stdout] 84 |             write!(file, "{} {} {}\n", r, g, b);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `write` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] running `Command { std: "docker" "inspect" "c2f206e00adf5a8161ad09657a4ab3fa60ee9cb773089b87f7a278153ea534dd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2f206e00adf5a8161ad09657a4ab3fa60ee9cb773089b87f7a278153ea534dd", kill_on_drop: false }`
[INFO] [stdout] c2f206e00adf5a8161ad09657a4ab3fa60ee9cb773089b87f7a278153ea534dd