[INFO] updating cached repository https://github.com/leviathan88/ray_tracer
[INFO] running `"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"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] bb18c665f678c99141053d2fbe5e3f8c38b881ca
[INFO] testing leviathan88/ray_tracer against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleviathan88%2Fray_tracer" "/workspace/builds/worker-10/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leviathan88/ray_tracer on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/leviathan88/ray_tracer
[INFO] finished tweaking git repo https://github.com/leviathan88/ray_tracer
[INFO] tweaked toml for git repo https://github.com/leviathan88/ray_tracer written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] crate git repo https://github.com/leviathan88/ray_tracer already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7ae437f0fe1f6977b05735f4905babb9dc773ecc1f107612d4ab4c18db9691a6
[INFO] running `"docker" "start" "-a" "7ae437f0fe1f6977b05735f4905babb9dc773ecc1f107612d4ab4c18db9691a6"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ray_tracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/tuples/mod.rs:161:9
[INFO] [stderr]     |
[INFO] [stderr] 161 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/utils/mod.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/color/mod.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 157 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/canvas/mod.rs:95:9
[INFO] [stderr]    |
[INFO] [stderr] 95 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/matrix/mod.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]   --> src/main.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let m = Matrix::construct_empty_3x3();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_equal_to`
[INFO] [stderr]   --> src/tuples/mod.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     pub fn is_equal_to(&self, tuple: &Tuple) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `negate`
[INFO] [stderr]   --> src/tuples/mod.rs:67:5
[INFO] [stderr]    |
[INFO] [stderr] 67 |     pub fn negate(&self) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `calculate_dot_product`
[INFO] [stderr]   --> src/tuples/mod.rs:88:5
[INFO] [stderr]    |
[INFO] [stderr] 88 |     pub fn calculate_dot_product(&self, tuple: &Tuple) -> Float {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_vector_cross_product`
[INFO] [stderr]   --> src/tuples/mod.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     pub fn get_vector_cross_product(&self, vector: &Tuple) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `compare_floats_32`
[INFO] [stderr]  --> src/utils/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn compare_floats_32(a: f32, b: f32) -> bool {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/color/mod.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new(red: ColorType, green: ColorType, blue: ColorType) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_ppm_value`
[INFO] [stderr]   --> src/color/mod.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     fn to_ppm_value(value: ColorType) -> ColorType {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_equal_to`
[INFO] [stderr]   --> src/color/mod.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 |     pub fn is_equal_to(self, other_color: Color) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `to_string`
[INFO] [stderr]   --> src/color/mod.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn to_string(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `red`
[INFO] [stderr]   --> src/color/mod.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     pub fn red() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `green`
[INFO] [stderr]   --> src/color/mod.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn green() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `blue`
[INFO] [stderr]   --> src/color/mod.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn blue() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `width`
[INFO] [stderr]  --> src/canvas/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     width: Size,
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `height`
[INFO] [stderr]   --> src/canvas/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     height: Size,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new_with_color`
[INFO] [stderr]   --> src/canvas/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn new_with_color(width: Size, height: Size, color: Color) -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `get_pixel_at`
[INFO] [stderr]   --> src/canvas/mod.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn get_pixel_at(&self, x: Size, y: Size) -> Color {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_ppm_header`
[INFO] [stderr]   --> src/canvas/mod.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn format_ppm_header(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_ppm_data`
[INFO] [stderr]   --> src/canvas/mod.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     pub fn format_ppm_data(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `format_vector`
[INFO] [stderr]   --> src/canvas/mod.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     fn format_vector(vec: Vec<String>) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `save_to_disk`
[INFO] [stderr]   --> src/canvas/mod.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn save_to_disk(&self) -> std::io::Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_empty_4x4`
[INFO] [stderr]  --> src/matrix/mod.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     pub fn construct_empty_4x4() -> MatrixType {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_empty_2x2`
[INFO] [stderr]   --> src/matrix/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn construct_empty_2x2() -> MatrixType {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `are_equal`
[INFO] [stderr]   --> src/matrix/mod.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn are_equal(m1: &MatrixType, m2: &MatrixType) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         file.write(header.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |         file.write(data.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 31 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.99s
[INFO] running `"docker" "inspect" "7ae437f0fe1f6977b05735f4905babb9dc773ecc1f107612d4ab4c18db9691a6"`
[INFO] running `"docker" "rm" "-f" "7ae437f0fe1f6977b05735f4905babb9dc773ecc1f107612d4ab4c18db9691a6"`
[INFO] [stdout] 7ae437f0fe1f6977b05735f4905babb9dc773ecc1f107612d4ab4c18db9691a6
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 406616184aed82a41fbec02220767abd0ef93cd36c7db8c47b6fbf0db50d80a3
[INFO] running `"docker" "start" "-a" "406616184aed82a41fbec02220767abd0ef93cd36c7db8c47b6fbf0db50d80a3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ray_tracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]   --> src/main.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let m = Matrix::construct_empty_3x3();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `green`
[INFO] [stderr]   --> src/color/mod.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn green() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `blue`
[INFO] [stderr]   --> src/color/mod.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn blue() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `save_to_disk`
[INFO] [stderr]   --> src/canvas/mod.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn save_to_disk(&self) -> std::io::Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_empty_2x2`
[INFO] [stderr]   --> src/matrix/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn construct_empty_2x2() -> MatrixType {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         file.write(header.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |         file.write(data.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.66s
[INFO] running `"docker" "inspect" "406616184aed82a41fbec02220767abd0ef93cd36c7db8c47b6fbf0db50d80a3"`
[INFO] running `"docker" "rm" "-f" "406616184aed82a41fbec02220767abd0ef93cd36c7db8c47b6fbf0db50d80a3"`
[INFO] [stdout] 406616184aed82a41fbec02220767abd0ef93cd36c7db8c47b6fbf0db50d80a3
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 6baf4117a1f09015c9262102a6e023d016cd4fd60dac5379b90ce1476fcbcecc
[INFO] running `"docker" "start" "-a" "6baf4117a1f09015c9262102a6e023d016cd4fd60dac5379b90ce1476fcbcecc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused variable: `m`
[INFO] [stderr]   --> src/main.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let m = Matrix::construct_empty_3x3();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_m`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `green`
[INFO] [stderr]   --> src/color/mod.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     pub fn green() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `blue`
[INFO] [stderr]   --> src/color/mod.rs:74:5
[INFO] [stderr]    |
[INFO] [stderr] 74 |     pub fn blue() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `save_to_disk`
[INFO] [stderr]   --> src/canvas/mod.rs:80:5
[INFO] [stderr]    |
[INFO] [stderr] 80 |     pub fn save_to_disk(&self) -> std::io::Result<()> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `construct_empty_2x2`
[INFO] [stderr]   --> src/matrix/mod.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     pub fn construct_empty_2x2() -> MatrixType {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:86:9
[INFO] [stderr]    |
[INFO] [stderr] 86 |         file.write(header.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/canvas/mod.rs:87:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |         file.write(data.as_bytes());
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/ray_tracer-f8d4582e59ee6fed
[INFO] [stdout] 
[INFO] [stdout] running 31 tests
[INFO] [stdout] test color::tests::test_add_colors ... ok
[INFO] [stdout] test canvas::tests::test_format_long_data ... ok
[INFO] [stdout] test color::tests::test_new_color ... ok
[INFO] [stdout] test tuples::tests::test_calculate_dot_product ... ok
[INFO] [stdout] test tuples::tests::test_add_point_and_vector ... ok
[INFO] [stdout] test canvas::tests::test_write_pixel ... ok
[INFO] [stdout] test canvas::tests::test_format_ppm_data ... ok
[INFO] [stdout] test tuples::tests::test_is_vector ... ok
[INFO] [stdout] test tuples::tests::test_multiply_by_scalar ... ok
[INFO] [stdout] test color::tests::test_hadamard_product ... ok
[INFO] [stdout] test tuples::tests::test_negate_tuple ... ok
[INFO] [stdout] test tuples::tests::test_new_point ... ok
[INFO] [stdout] test tuples::tests::test_normalize ... ok
[INFO] [stdout] test tuples::tests::test_subtract_point_and_vector ... ok
[INFO] [stdout] test tuples::tests::test_subtract_two_points ... ok
[INFO] [stdout] test tuples::tests::test_subtract_two_vectors ... ok
[INFO] [stdout] test tuples::tests::test_subtract_vector_from_zero_vector ... ok
[INFO] [stdout] test tuples::tests::test_vector_magnitude ... ok
[INFO] [stdout] test utils::tests::test_compare_floats ... ok
[INFO] [stdout] test utils::tests::test_compare_floats_with_way_too_small_numbers ... ok
[INFO] [stdout] test canvas::tests::test_new_canvas ... ok
[INFO] [stdout] test tuples::tests::test_new_vector ... ok
[INFO] [stdout] test canvas::tests::test_format_ppm_header ... ok
[INFO] [stdout] test matrix::tests::test_matrix_4x4 ... ok
[INFO] [stdout] test tuples::tests::test_compare_two_tuples ... ok
[INFO] [stdout] test tuples::tests::test_is_point ... ok
[INFO] [stdout] test tuples::tests::test_divide_by_scalar ... ok
[INFO] [stdout] test color::tests::test_sub_colors ... ok
[INFO] [stdout] test color::tests::test_multiply_by_sclar ... ok
[INFO] [stdout] test tuples::tests::test_calculate_vector_cross_product ... ok
[INFO] [stdout] test matrix::tests::test_matrix_equality ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 31 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "6baf4117a1f09015c9262102a6e023d016cd4fd60dac5379b90ce1476fcbcecc"`
[INFO] running `"docker" "rm" "-f" "6baf4117a1f09015c9262102a6e023d016cd4fd60dac5379b90ce1476fcbcecc"`
[INFO] [stdout] 6baf4117a1f09015c9262102a6e023d016cd4fd60dac5379b90ce1476fcbcecc