[INFO] cloning repository https://github.com/patsore/n-body-fmm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/patsore/n-body-fmm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpatsore%2Fn-body-fmm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpatsore%2Fn-body-fmm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6e7468e5f666b2f0eb6f61b84ef734ea1c5d6e38
[INFO] testing patsore/n-body-fmm against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpatsore%2Fn-body-fmm" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/patsore/n-body-fmm
[INFO] finished tweaking git repo https://github.com/patsore/n-body-fmm
[INFO] tweaked toml for git repo https://github.com/patsore/n-body-fmm written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/patsore/n-body-fmm on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/patsore/n-body-fmm 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] [stdout] 8887c5937a67c89a0e869ae0e4e9c99ad0551ebf6c8ae45f6fdeb8530568eef3
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[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:295:36
[INFO] [stdout]     |
[INFO] [stdout] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:295:64
[INFO] [stdout]     |
[INFO] [stdout] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stdout]     |                                                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:311:34
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let r = radius + rng.gen_range(-radius..radius);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:312:29
[INFO] [stdout]     |
[INFO] [stdout] 312 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:313:70
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stdout]     |                                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:325:36
[INFO] [stdout]     |
[INFO] [stdout] 325 |             let r = radius_2 + rng.gen_range(-radius_2..radius_2);
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:326:29
[INFO] [stdout]     |
[INFO] [stdout] 326 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:327:70
[INFO] [stdout]     |
[INFO] [stdout] 327 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stdout]     |                                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut level_nodes: Vec<Vec<usize>> = (1..MAX_DEPTH).map(|i| Vec::with_capacity(4_usize.pow((i - 1) as u32))).collect();
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:310:13
[INFO] [stdout]     |
[INFO] [stdout] 310 |         for i in 0..num_bodies / 4 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]    --> src/main.rs:324:13
[INFO] [stdout]     |
[INFO] [stdout] 324 |         for j in 0..num_bodies / 4 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CENTER_OF_MASS_PRECISION` is never used
[INFO] [stdout]   --> src/main.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const CENTER_OF_MASS_PRECISION: f32 = 0.001;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MIN_NODE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const MIN_NODE_SIZE: f32 = 0.1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `magma_quintic` is never used
[INFO] [stdout]   --> src/rendering.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn magma_quintic(input: f32) -> Rgb<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 50.11s
[INFO] running `Command { std: "docker" "inspect" "8887c5937a67c89a0e869ae0e4e9c99ad0551ebf6c8ae45f6fdeb8530568eef3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8887c5937a67c89a0e869ae0e4e9c99ad0551ebf6c8ae45f6fdeb8530568eef3", kill_on_drop: false }`
[INFO] [stdout] 8887c5937a67c89a0e869ae0e4e9c99ad0551ebf6c8ae45f6fdeb8530568eef3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f75ed7b3e24b3266705fe593f7765fcfd411305ac17b83e55d1d5ef56e332444
[INFO] running `Command { std: "docker" "start" "-a" "f75ed7b3e24b3266705fe593f7765fcfd411305ac17b83e55d1d5ef56e332444", kill_on_drop: false }`
[INFO] [stderr]    Compiling BeFFR v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:295:36
[INFO] [stdout]     |
[INFO] [stdout] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:295:64
[INFO] [stdout]     |
[INFO] [stdout] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stdout]     |                                                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:311:34
[INFO] [stdout]     |
[INFO] [stdout] 311 |             let r = radius + rng.gen_range(-radius..radius);
[INFO] [stdout]     |                                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:312:29
[INFO] [stdout]     |
[INFO] [stdout] 312 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:313:70
[INFO] [stdout]     |
[INFO] [stdout] 313 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stdout]     |                                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:325:36
[INFO] [stdout]     |
[INFO] [stdout] 325 |             let r = radius_2 + rng.gen_range(-radius_2..radius_2);
[INFO] [stdout]     |                                    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:326:29
[INFO] [stdout]     |
[INFO] [stdout] 326 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stdout]     |                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stdout]    --> src/main.rs:327:70
[INFO] [stdout]     |
[INFO] [stdout] 327 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stdout]     |                                                                      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:75:13
[INFO] [stdout]    |
[INFO] [stdout] 75 |         let mut level_nodes: Vec<Vec<usize>> = (1..MAX_DEPTH).map(|i| Vec::with_capacity(4_usize.pow((i - 1) as u32))).collect();
[INFO] [stdout]    |             ----^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:310:13
[INFO] [stdout]     |
[INFO] [stdout] 310 |         for i in 0..num_bodies / 4 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `j`
[INFO] [stdout]    --> src/main.rs:324:13
[INFO] [stdout]     |
[INFO] [stdout] 324 |         for j in 0..num_bodies / 4 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `CENTER_OF_MASS_PRECISION` is never used
[INFO] [stdout]   --> src/main.rs:15:7
[INFO] [stdout]    |
[INFO] [stdout] 15 | const CENTER_OF_MASS_PRECISION: f32 = 0.001;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MIN_NODE_SIZE` is never used
[INFO] [stdout]   --> src/main.rs:17:7
[INFO] [stdout]    |
[INFO] [stdout] 17 | const MIN_NODE_SIZE: f32 = 0.1;
[INFO] [stdout]    |       ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `magma_quintic` is never used
[INFO] [stdout]   --> src/rendering.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn magma_quintic(input: f32) -> Rgb<u8> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "f75ed7b3e24b3266705fe593f7765fcfd411305ac17b83e55d1d5ef56e332444", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f75ed7b3e24b3266705fe593f7765fcfd411305ac17b83e55d1d5ef56e332444", kill_on_drop: false }`
[INFO] [stdout] f75ed7b3e24b3266705fe593f7765fcfd411305ac17b83e55d1d5ef56e332444
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2fb010d41794ccb7afc07ba345a2016648f651cc88534157a7c670d32e0a2053
[INFO] running `Command { std: "docker" "start" "-a" "2fb010d41794ccb7afc07ba345a2016648f651cc88534157a7c670d32e0a2053", kill_on_drop: false }`
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:295:36
[INFO] [stderr]     |
[INFO] [stderr] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stderr]     |                                    ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:295:64
[INFO] [stderr]     |
[INFO] [stderr] 295 |             .map(|_| Vec2::new(rng.gen_range(-size..size), rng.gen_range(-size..size)))
[INFO] [stderr]     |                                                                ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:311:34
[INFO] [stderr]     |
[INFO] [stderr] 311 |             let r = radius + rng.gen_range(-radius..radius);
[INFO] [stderr]     |                                  ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:312:29
[INFO] [stderr]     |
[INFO] [stderr] 312 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stderr]     |                             ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:313:70
[INFO] [stderr]     |
[INFO] [stderr] 313 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stderr]     |                                                                      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:325:36
[INFO] [stderr]     |
[INFO] [stderr] 325 |             let r = radius_2 + rng.gen_range(-radius_2..radius_2);
[INFO] [stderr]     |                                    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:326:29
[INFO] [stderr]     |
[INFO] [stderr] 326 |             let angle = rng.gen_range(0.0f32..std::f32::consts::TAU);
[INFO] [stderr]     |                             ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated method `rand::Rng::gen_range`: Renamed to `random_range`
[INFO] [stderr]    --> src/main.rs:327:70
[INFO] [stderr]     |
[INFO] [stderr] 327 |             let vec = Vec2::new(angle.sin(), angle.cos()) * (r - rng.gen_range(-r..0.0));
[INFO] [stderr]     |                                                                      ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:75:13
[INFO] [stderr]    |
[INFO] [stderr] 75 |         let mut level_nodes: Vec<Vec<usize>> = (1..MAX_DEPTH).map(|i| Vec::with_capacity(4_usize.pow((i - 1) as u32))).collect();
[INFO] [stderr]    |             ----^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:310:13
[INFO] [stderr]     |
[INFO] [stderr] 310 |         for i in 0..num_bodies / 4 {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `j`
[INFO] [stderr]    --> src/main.rs:324:13
[INFO] [stderr]     |
[INFO] [stderr] 324 |         for j in 0..num_bodies / 4 {
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_j`
[INFO] [stderr] 
[INFO] [stderr] warning: constant `CENTER_OF_MASS_PRECISION` is never used
[INFO] [stderr]   --> src/main.rs:15:7
[INFO] [stderr]    |
[INFO] [stderr] 15 | const CENTER_OF_MASS_PRECISION: f32 = 0.001;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant `MIN_NODE_SIZE` is never used
[INFO] [stderr]   --> src/main.rs:17:7
[INFO] [stderr]    |
[INFO] [stderr] 17 | const MIN_NODE_SIZE: f32 = 0.1;
[INFO] [stderr]    |       ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `magma_quintic` is never used
[INFO] [stderr]   --> src/rendering.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn magma_quintic(input: f32) -> Rgb<u8> {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `BeFFR` (bin "BeFFR" test) generated 14 warnings (run `cargo fix --bin "BeFFR" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/BeFFR-ba8a6379e2095f64)
[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" "2fb010d41794ccb7afc07ba345a2016648f651cc88534157a7c670d32e0a2053", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2fb010d41794ccb7afc07ba345a2016648f651cc88534157a7c670d32e0a2053", kill_on_drop: false }`
[INFO] [stdout] 2fb010d41794ccb7afc07ba345a2016648f651cc88534157a7c670d32e0a2053
