[INFO] cloning repository https://github.com/Robert-Cunningham/rust-raytracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Robert-Cunningham/rust-raytracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobert-Cunningham%2Frust-raytracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobert-Cunningham%2Frust-raytracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5773caf6ade843e60bb9ca45c5adaf2892b7e44b
[INFO] testing Robert-Cunningham/rust-raytracer against beta-2024-12-08 for beta-1.84.0-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobert-Cunningham%2Frust-raytracer" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Robert-Cunningham/rust-raytracer on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Robert-Cunningham/rust-raytracer
[INFO] finished tweaking git repo https://github.com/Robert-Cunningham/rust-raytracer
[INFO] tweaked toml for git repo https://github.com/Robert-Cunningham/rust-raytracer written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Robert-Cunningham/rust-raytracer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing Robert-Cunningham/rust-raytracer against beta-2024-12-08 for beta-1.84.0-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRobert-Cunningham%2Frust-raytracer" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Robert-Cunningham/rust-raytracer on toolchain beta-2024-12-08
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Robert-Cunningham/rust-raytracer
[INFO] finished tweaking git repo https://github.com/Robert-Cunningham/rust-raytracer
[INFO] tweaked toml for git repo https://github.com/Robert-Cunningham/rust-raytracer written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Robert-Cunningham/rust-raytracer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-12-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+beta-2024-12-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc683fcb500ee0444efd2049ac97994c1c6b35337d255fc1dfb0027fe72c9de6
[INFO] running `Command { std: "docker" "start" "-a" "fc683fcb500ee0444efd2049ac97994c1c6b35337d255fc1dfb0027fe72c9de6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc683fcb500ee0444efd2049ac97994c1c6b35337d255fc1dfb0027fe72c9de6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc683fcb500ee0444efd2049ac97994c1c6b35337d255fc1dfb0027fe72c9de6", kill_on_drop: false }`
[INFO] [stdout] fc683fcb500ee0444efd2049ac97994c1c6b35337d255fc1dfb0027fe72c9de6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-12-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2094af5d4d8cd6e92161f7c7ecda3bda7937ef2638bce9043de027b9a2d74ad5
[INFO] running `Command { std: "docker" "start" "-a" "2094af5d4d8cd6e92161f7c7ecda3bda7937ef2638bce9043de027b9a2d74ad5", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `vec3` should have an upper camel case name
[INFO] [stdout]  --> src/vec3.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct vec3 {
[INFO] [stdout]   |            ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Vec3`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ray` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct ray {
[INFO] [stdout]   |        ^^^ help: convert the identifier to upper camel case: `Ray`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ray` is never constructed
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct ray {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parameterize` is never used
[INFO] [stdout]   --> src/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl ray {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 14 |     fn parameterize(self, t: f64) -> vec3::vec3 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `length` is never used
[INFO] [stdout]   --> src/vec3.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl vec3 {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 11 |     fn length(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dot` is never used
[INFO] [stdout]   --> src/vec3.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl vec3 {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 41 |     fn dot(self, r: vec3) -> f64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     save_image(200, 100);
[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] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let _ = save_image(200, 100);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "2094af5d4d8cd6e92161f7c7ecda3bda7937ef2638bce9043de027b9a2d74ad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2094af5d4d8cd6e92161f7c7ecda3bda7937ef2638bce9043de027b9a2d74ad5", kill_on_drop: false }`
[INFO] [stdout] 2094af5d4d8cd6e92161f7c7ecda3bda7937ef2638bce9043de027b9a2d74ad5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-12-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc5586c4e90fe770fd74b60cb3505428637febccff3ca70a8ed6732d0995bc00
[INFO] running `Command { std: "docker" "start" "-a" "cc5586c4e90fe770fd74b60cb3505428637febccff3ca70a8ed6732d0995bc00", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-raytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::ops`
[INFO] [stdout]  --> src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::ops;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::fmt;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `vec3` should have an upper camel case name
[INFO] [stdout]  --> src/vec3.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct vec3 {
[INFO] [stdout]   |            ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Vec3`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `ray` should have an upper camel case name
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct ray {
[INFO] [stdout]   |        ^^^ help: convert the identifier to upper camel case: `Ray`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ray` is never constructed
[INFO] [stdout]  --> src/main.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct ray {
[INFO] [stdout]   |        ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parameterize` is never used
[INFO] [stdout]   --> src/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl ray {
[INFO] [stdout]    | -------- method in this implementation
[INFO] [stdout] 14 |     fn parameterize(self, t: f64) -> vec3::vec3 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `length` is never used
[INFO] [stdout]   --> src/vec3.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl vec3 {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 11 |     fn length(&self) -> f64 {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `dot` is never used
[INFO] [stdout]   --> src/vec3.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 40 | impl vec3 {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] 41 |     fn dot(self, r: vec3) -> f64 {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     save_image(200, 100);
[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] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let _ = save_image(200, 100);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.20s
[INFO] running `Command { std: "docker" "inspect" "cc5586c4e90fe770fd74b60cb3505428637febccff3ca70a8ed6732d0995bc00", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc5586c4e90fe770fd74b60cb3505428637febccff3ca70a8ed6732d0995bc00", kill_on_drop: false }`
[INFO] [stdout] cc5586c4e90fe770fd74b60cb3505428637febccff3ca70a8ed6732d0995bc00
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+beta-2024-12-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3b18790442b7ff73c617842cd0dce62d82ab12d263f474ddb1da881dda73a668
[INFO] running `Command { std: "docker" "start" "-a" "3b18790442b7ff73c617842cd0dce62d82ab12d263f474ddb1da881dda73a668", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::ops`
[INFO] [stderr]  --> src/main.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::ops;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::fmt;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `vec3` should have an upper camel case name
[INFO] [stderr]  --> src/vec3.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct vec3 {
[INFO] [stderr]   |            ^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Vec3`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `ray` should have an upper camel case name
[INFO] [stderr]  --> src/main.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct ray {
[INFO] [stderr]   |        ^^^ help: convert the identifier to upper camel case: `Ray`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `ray` is never constructed
[INFO] [stderr]  --> src/main.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | struct ray {
[INFO] [stderr]   |        ^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method `parameterize` is never used
[INFO] [stderr]   --> src/main.rs:14:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | impl ray {
[INFO] [stderr]    | -------- method in this implementation
[INFO] [stderr] 14 |     fn parameterize(self, t: f64) -> vec3::vec3 {
[INFO] [stderr]    |        ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `length` is never used
[INFO] [stderr]   --> src/vec3.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | impl vec3 {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] 11 |     fn length(&self) -> f64 {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method `dot` is never used
[INFO] [stderr]   --> src/vec3.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 40 | impl vec3 {
[INFO] [stderr]    | --------- method in this implementation
[INFO] [stderr] 41 |     fn dot(self, r: vec3) -> f64 {
[INFO] [stderr]    |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 22 |     save_image(200, 100);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let _ = save_image(200, 100);
[INFO] [stderr]    |     +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rust-raytracer` (bin "rust-raytracer" test) generated 9 warnings (run `cargo fix --bin "rust-raytracer" --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_raytracer-7140323a77fa500a)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3b18790442b7ff73c617842cd0dce62d82ab12d263f474ddb1da881dda73a668", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b18790442b7ff73c617842cd0dce62d82ab12d263f474ddb1da881dda73a668", kill_on_drop: false }`
[INFO] [stdout] 3b18790442b7ff73c617842cd0dce62d82ab12d263f474ddb1da881dda73a668