[INFO] updating cached repository https://github.com/seandmccarthy/the_ray_tracer_challenge_rs
[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] b28fd14c2e0c569d64d49737086255007bdc7304
[INFO] checking seandmccarthy/the_ray_tracer_challenge_rs against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fseandmccarthy%2Fthe_ray_tracer_challenge_rs" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/seandmccarthy/the_ray_tracer_challenge_rs on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/seandmccarthy/the_ray_tracer_challenge_rs
[INFO] finished tweaking git repo https://github.com/seandmccarthy/the_ray_tracer_challenge_rs
[INFO] tweaked toml for git repo https://github.com/seandmccarthy/the_ray_tracer_challenge_rs written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/seandmccarthy/the_ray_tracer_challenge_rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=forbid" "-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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8b08a2d17fb6c983e202052fe358e285ac6436597eacbc930815a9d338fcdcb2
[INFO] running `"docker" "start" "-a" "8b08a2d17fb6c983e202052fe358e285ac6436597eacbc930815a9d338fcdcb2"`
[INFO] [stderr]     Checking ray_tracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/rt/tuple.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple`
[INFO] [stderr]   --> src/rt/tuple.rs:74:8
[INFO] [stderr]    |
[INFO] [stderr] 74 | pub fn tuple(x: f64, y: f64, z: f64, w: f64) -> Tuple {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/tuple.rs:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn colour(red: f64, green: f64, blue: f64) -> Tuple {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dot`
[INFO] [stderr]    --> src/rt/tuple.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 | pub fn dot(a: &Tuple, b: &Tuple) -> f64 {
[INFO] [stderr]     |        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `cross`
[INFO] [stderr]    --> src/rt/tuple.rs:108:8
[INFO] [stderr]     |
[INFO] [stderr] 108 | pub fn cross(a: &Tuple, b: &Tuple) -> Tuple {
[INFO] [stderr]     |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/colour.rs:10:8
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn colour(red: f64, green: f64, blue: f64) -> Colour {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Canvas`
[INFO] [stderr]  --> src/rt/canvas.rs:3:12
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub struct Canvas {
[INFO] [stderr]   |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/rt/canvas.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     fn new(width: usize, height: usize) -> Canvas {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `pixel_at`
[INFO] [stderr]   --> src/rt/canvas.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     fn pixel_at(&self, x: usize, y: usize) -> & Colour {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `write_pixel`
[INFO] [stderr]   --> src/rt/canvas.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn write_pixel(&mut self, x: usize, y: usize, colour: Colour) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/rt/tuple.rs:71:8
[INFO] [stderr]    |
[INFO] [stderr] 71 | pub fn run() {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `colour`
[INFO] [stderr]   --> src/rt/tuple.rs:86:8
[INFO] [stderr]    |
[INFO] [stderr] 86 | pub fn colour(red: f64, green: f64, blue: f64) -> Tuple {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `"docker" "inspect" "8b08a2d17fb6c983e202052fe358e285ac6436597eacbc930815a9d338fcdcb2"`
[INFO] running `"docker" "rm" "-f" "8b08a2d17fb6c983e202052fe358e285ac6436597eacbc930815a9d338fcdcb2"`
[INFO] [stdout] 8b08a2d17fb6c983e202052fe358e285ac6436597eacbc930815a9d338fcdcb2