[INFO] cloning repository https://github.com/JarredAllen/Perlin-Rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JarredAllen/Perlin-Rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJarredAllen%2FPerlin-Rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJarredAllen%2FPerlin-Rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7f7bd68f8a433ff5d299a7870f900a8c009afddf
[INFO] testing JarredAllen/Perlin-Rust against try#ce59db7a1b1b012fb2793c4641c1bdecad7a128b for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJarredAllen%2FPerlin-Rust" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JarredAllen/Perlin-Rust on toolchain ce59db7a1b1b012fb2793c4641c1bdecad7a128b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JarredAllen/Perlin-Rust
[INFO] finished tweaking git repo https://github.com/JarredAllen/Perlin-Rust
[INFO] tweaked toml for git repo https://github.com/JarredAllen/Perlin-Rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/JarredAllen/Perlin-Rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand v0.7.1
[INFO] [stderr]   Downloaded image v0.22.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad8def8002bcde4fd6f3638ba82ddf11de8ae275a3cce17e3d64acb7c2d4207f
[INFO] running `Command { std: "docker" "start" "-a" "ad8def8002bcde4fd6f3638ba82ddf11de8ae275a3cce17e3d64acb7c2d4207f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad8def8002bcde4fd6f3638ba82ddf11de8ae275a3cce17e3d64acb7c2d4207f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad8def8002bcde4fd6f3638ba82ddf11de8ae275a3cce17e3d64acb7c2d4207f", kill_on_drop: false }`
[INFO] [stdout] ad8def8002bcde4fd6f3638ba82ddf11de8ae275a3cce17e3d64acb7c2d4207f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec64e25cedf1642dc4e5dafb78212c19c64db0ff23d3fd72019a1d64be96002e
[INFO] running `Command { std: "docker" "start" "-a" "ec64e25cedf1642dc4e5dafb78212c19c64db0ff23d3fd72019a1d64be96002e", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling nodrop v0.1.13
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling scopeguard v1.0.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling lzw v0.10.0
[INFO] [stderr]    Compiling unicode-width v0.1.6
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling yaml-rust v0.3.5
[INFO] [stderr]    Compiling md5 v0.6.1
[INFO] [stderr]    Compiling inflate v0.4.5
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling gif v0.10.2
[INFO] [stderr]    Compiling c2-chacha v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling deflate v0.7.20
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling getrandom v0.1.12
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling png v0.15.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.1
[INFO] [stderr]    Compiling rayon v1.2.0
[INFO] [stderr]    Compiling rand v0.7.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.16
[INFO] [stderr]    Compiling tiff v0.3.1
[INFO] [stderr]    Compiling image v0.22.2
[INFO] [stderr]    Compiling perlin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/perlin/octave.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for i in 0..depth {
[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: function is never used: `linear_interpolate`
[INFO] [stdout]   --> src/perlin/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn linear_interpolate(a0: f64, a1: f64, a1_weight: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `matches`
[INFO] [stdout]   --> src/main.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |     if let Some(matches) = matches.subcommand_matches("perlin") {
[INFO] [stdout]    |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             make_color_octave_image(&hue, &sat, &val, width, length).save(outfile);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             make_octave_image(octave, width, length).save(outfile);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.39s
[INFO] running `Command { std: "docker" "inspect" "ec64e25cedf1642dc4e5dafb78212c19c64db0ff23d3fd72019a1d64be96002e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec64e25cedf1642dc4e5dafb78212c19c64db0ff23d3fd72019a1d64be96002e", kill_on_drop: false }`
[INFO] [stdout] ec64e25cedf1642dc4e5dafb78212c19c64db0ff23d3fd72019a1d64be96002e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0272c5b62a78a966233da573c2ba8b225fb83cee414c6d63c3c52441cf1527de
[INFO] running `Command { std: "docker" "start" "-a" "0272c5b62a78a966233da573c2ba8b225fb83cee414c6d63c3c52441cf1527de", kill_on_drop: false }`
[INFO] [stderr]    Compiling perlin v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/perlin/octave.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for i in 0..depth {
[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: function is never used: `linear_interpolate`
[INFO] [stdout]   --> src/perlin/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn linear_interpolate(a0: f64, a1: f64, a1_weight: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `matches`
[INFO] [stdout]   --> src/main.rs:16:17
[INFO] [stdout]    |
[INFO] [stdout] 16 |     if let Some(matches) = matches.subcommand_matches("perlin") {
[INFO] [stdout]    |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_matches`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             make_color_octave_image(&hue, &sat, &val, width, length).save(outfile);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/main.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             make_octave_image(octave, width, length).save(outfile);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/perlin/octave.rs:31:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |         for i in 0..depth {
[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: function is never used: `linear_interpolate`
[INFO] [stdout]   --> src/perlin/mod.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn linear_interpolate(a0: f64, a1: f64, a1_weight: f64) -> f64 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "0272c5b62a78a966233da573c2ba8b225fb83cee414c6d63c3c52441cf1527de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0272c5b62a78a966233da573c2ba8b225fb83cee414c6d63c3c52441cf1527de", kill_on_drop: false }`
[INFO] [stdout] 0272c5b62a78a966233da573c2ba8b225fb83cee414c6d63c3c52441cf1527de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ce59db7a1b1b012fb2793c4641c1bdecad7a128b" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] cf213bb9920488d05580cfcc6d3057011229d463aa5c3dfca87fa58935c6088b
[INFO] running `Command { std: "docker" "start" "-a" "cf213bb9920488d05580cfcc6d3057011229d463aa5c3dfca87fa58935c6088b", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/perlin/octave.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         for i in 0..depth {
[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: function is never used: `linear_interpolate`
[INFO] [stderr]   --> src/perlin/mod.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn linear_interpolate(a0: f64, a1: f64, a1_weight: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/perlin/octave.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |         for i in 0..depth {
[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: function is never used: `linear_interpolate`
[INFO] [stderr]   --> src/perlin/mod.rs:10:4
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn linear_interpolate(a0: f64, a1: f64, a1_weight: f64) -> f64 {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `matches`
[INFO] [stderr]   --> src/main.rs:16:17
[INFO] [stderr]    |
[INFO] [stderr] 16 |     if let Some(matches) = matches.subcommand_matches("perlin") {
[INFO] [stderr]    |                 ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_matches`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `Result` that must be used
[INFO] [stderr]   --> src/main.rs:28:13
[INFO] [stderr]    |
[INFO] [stderr] 28 |             make_color_octave_image(&hue, &sat, &val, width, length).save(outfile);
[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 `Result` that must be used
[INFO] [stderr]   --> src/main.rs:31:13
[INFO] [stderr]    |
[INFO] [stderr] 31 |             make_octave_image(octave, width, length).save(outfile);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/perlin-6479f50d2bbb044d)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/perlin-86dda2be2a438ccc)
[INFO] [stdout] test perlin::tests::test_vec_consistency ... ok
[INFO] [stderr]    Doc-tests perlin
[INFO] [stdout] test perlin::tests::test_consistency ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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] [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" "cf213bb9920488d05580cfcc6d3057011229d463aa5c3dfca87fa58935c6088b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf213bb9920488d05580cfcc6d3057011229d463aa5c3dfca87fa58935c6088b", kill_on_drop: false }`
[INFO] [stdout] cf213bb9920488d05580cfcc6d3057011229d463aa5c3dfca87fa58935c6088b