[INFO] cloning repository https://github.com/hamaluik/tinyraytracer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hamaluik/tinyraytracer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamaluik%2Ftinyraytracer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamaluik%2Ftinyraytracer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78764df74399327068e796d6ea2d70a5d5e1e2b4
[INFO] testing hamaluik/tinyraytracer against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_getrandom_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhamaluik%2Ftinyraytracer" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/hamaluik/tinyraytracer
[INFO] finished tweaking git repo https://github.com/hamaluik/tinyraytracer
[INFO] tweaked toml for git repo https://github.com/hamaluik/tinyraytracer written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/hamaluik/tinyraytracer on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/hamaluik/tinyraytracer 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded libc v0.2.48
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 078d500274b4694709043e1e55d7cb943eaf3a517821998050e84f60cb627466
[INFO] running `Command { std: "docker" "start" "-a" "078d500274b4694709043e1e55d7cb943eaf3a517821998050e84f60cb627466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "078d500274b4694709043e1e55d7cb943eaf3a517821998050e84f60cb627466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "078d500274b4694709043e1e55d7cb943eaf3a517821998050e84f60cb627466", kill_on_drop: false }`
[INFO] [stdout] 078d500274b4694709043e1e55d7cb943eaf3a517821998050e84f60cb627466
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 3925284753e52ac4840faff3c348f65d50bd1803f899e68783a299e5be074a87
[INFO] running `Command { std: "docker" "start" "-a" "3925284753e52ac4840faff3c348f65d50bd1803f899e68783a299e5be074a87", kill_on_drop: false }`
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling libc v0.2.48
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.1
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling tinyraytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:50:77
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stdout]    |                                                                             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a dyn Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stdout]    |                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:69:73
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Ve...
[INFO] [stdout]    |                                                                         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a dyn Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Vec3f> {
[INFO] [stdout]    |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:165:56
[INFO] [stdout]     |
[INFO] [stdout] 165 |             let objects = objects.iter().map(|o| o as &Intersectable).collect();
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 165 |             let objects = objects.iter().map(|o| o as &dyn Intersectable).collect();
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.63s
[INFO] running `Command { std: "docker" "inspect" "3925284753e52ac4840faff3c348f65d50bd1803f899e68783a299e5be074a87", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3925284753e52ac4840faff3c348f65d50bd1803f899e68783a299e5be074a87", kill_on_drop: false }`
[INFO] [stdout] 3925284753e52ac4840faff3c348f65d50bd1803f899e68783a299e5be074a87
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] b4f23f950f9a4d92763ca8ca14f164fa65253a6168620817f504426f8e8cc3ee
[INFO] running `Command { std: "docker" "start" "-a" "b4f23f950f9a4d92763ca8ca14f164fa65253a6168620817f504426f8e8cc3ee", kill_on_drop: false }`
[INFO] [stderr]    Compiling tinyraytracer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:50:77
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stdout]    |                                                                             ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a dyn Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stdout]    |                                                                             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:69:73
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Ve...
[INFO] [stdout]    |                                                                         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a dyn Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Vec3f> {
[INFO] [stdout]    |                                                                         +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:165:56
[INFO] [stdout]     |
[INFO] [stdout] 165 |             let objects = objects.iter().map(|o| o as &Intersectable).collect();
[INFO] [stdout]     |                                                        ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 165 |             let objects = objects.iter().map(|o| o as &dyn Intersectable).collect();
[INFO] [stdout]     |                                                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/tests.rs:119:60
[INFO] [stdout]     |
[INFO] [stdout] 119 |                 let objects = objects.iter().map(|o| o as &Intersectable).collect();
[INFO] [stdout]     |                                                            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]     |
[INFO] [stdout] 119 |                 let objects = objects.iter().map(|o| o as &dyn Intersectable).collect();
[INFO] [stdout]     |                                                            +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.88s
[INFO] running `Command { std: "docker" "inspect" "b4f23f950f9a4d92763ca8ca14f164fa65253a6168620817f504426f8e8cc3ee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4f23f950f9a4d92763ca8ca14f164fa65253a6168620817f504426f8e8cc3ee", kill_on_drop: false }`
[INFO] [stdout] b4f23f950f9a4d92763ca8ca14f164fa65253a6168620817f504426f8e8cc3ee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] eb9e3f0a9e0537c51599df43f7f244965d24f5cf0d2d659055d762023a701c94
[INFO] running `Command { std: "docker" "start" "-a" "eb9e3f0a9e0537c51599df43f7f244965d24f5cf0d2d659055d762023a701c94", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::ray_should_intersect_sphere_centre_deflected ... ok
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:50:77
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stderr]    |                                                                             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn scene_intersect<'a>(origin: &Vec3f, direction: &Vec3f, objects: &Vec<&'a dyn Intersectable>) -> Option<(Intersection, &'a Material)> {
[INFO] [stderr]    |                                                                             +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:69:73
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Ve...
[INFO] [stderr]    |                                                                         ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn cast_ray<'a>(origin: &Vec3f, direction: &Vec3f, objects: &'a Vec<&'a dyn Intersectable>, lights: &Vec<Light>, bounces: isize) -> Option<Vec3f> {
[INFO] [stderr]    |                                                                         +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:165:56
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let objects = objects.iter().map(|o| o as &Intersectable).collect();
[INFO] [stderr]     |                                                        ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 165 |             let objects = objects.iter().map(|o| o as &dyn Intersectable).collect();
[INFO] [stderr]     |                                                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/tests.rs:119:60
[INFO] [stderr]     |
[INFO] [stderr] 119 |                 let objects = objects.iter().map(|o| o as &Intersectable).collect();
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]     |
[INFO] [stderr] 119 |                 let objects = objects.iter().map(|o| o as &dyn Intersectable).collect();
[INFO] [stderr]     |                                                            +++
[INFO] [stderr] 
[INFO] [stderr] warning: `tinyraytracer` (bin "tinyraytracer" test) generated 4 warnings (run `cargo fix --bin "tinyraytracer" --tests` to apply 4 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/tinyraytracer-52f59a23612076b7)
[INFO] [stdout] test tests::ray_should_intersect_sphere_centre_deflected_2 ... ok
[INFO] [stdout] test tests::ray_should_intersect_sphere_direct ... ok
[INFO] [stdout] test tests::ray_should_miss ... ok
[INFO] [stdout] test tests::ray_should_not_intersect_sphere_behind ... ok
[INFO] [stdout] test tests::tiler_should_hit_all_tiles ... ok
[INFO] [stdout] test tests::simple_scene ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.59s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "eb9e3f0a9e0537c51599df43f7f244965d24f5cf0d2d659055d762023a701c94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb9e3f0a9e0537c51599df43f7f244965d24f5cf0d2d659055d762023a701c94", kill_on_drop: false }`
[INFO] [stdout] eb9e3f0a9e0537c51599df43f7f244965d24f5cf0d2d659055d762023a701c94