[INFO] cloning repository https://github.com/willholl4nd/rustmazecreator [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/willholl4nd/rustmazecreator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillholl4nd%2Frustmazecreator", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillholl4nd%2Frustmazecreator'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 089b1eecf9bc38c42c04179725b24dbcd5fe1a5f [INFO] linting willholl4nd/rustmazecreator against nightly for clippy-nonminimal_bool-denied [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwillholl4nd%2Frustmazecreator" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] [stderr] Updating files: 87% (7/8) Updating files: 100% (8/8) Updating files: 100% (8/8), done. [INFO] started tweaking git repo https://github.com/willholl4nd/rustmazecreator [INFO] finished tweaking git repo https://github.com/willholl4nd/rustmazecreator [INFO] tweaked toml for git repo https://github.com/willholl4nd/rustmazecreator written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/willholl4nd/rustmazecreator on toolchain nightly [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/willholl4nd/rustmazecreator 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded crossbeam-deque v0.8.2 [INFO] [stderr] Downloaded lock_api v0.4.8 [INFO] [stderr] Downloaded crossbeam-epoch v0.9.10 [INFO] [stderr] Downloaded bytemuck v1.12.1 [INFO] [stderr] Downloaded image v0.24.3 [INFO] [stderr] Downloaded exr v1.5.0 [INFO] [stderr] Downloaded spin v0.9.4 [INFO] [stderr] Downloaded crossbeam-channel v0.5.6 [INFO] [stderr] Downloaded tiff v0.7.3 [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_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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f8aabf514b8cd0ca112e80f47faa5c9ba85d6237cc49459c8e8e5f4a4e48d45c [INFO] running `Command { std: "docker" "start" "-a" "f8aabf514b8cd0ca112e80f47faa5c9ba85d6237cc49459c8e8e5f4a4e48d45c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f8aabf514b8cd0ca112e80f47faa5c9ba85d6237cc49459c8e8e5f4a4e48d45c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f8aabf514b8cd0ca112e80f47faa5c9ba85d6237cc49459c8e8e5f4a4e48d45c", kill_on_drop: false }` [INFO] [stdout] f8aabf514b8cd0ca112e80f47faa5c9ba85d6237cc49459c8e8e5f4a4e48d45c [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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5317e0f1b080499c302bbb9695481c7e315eafb43fcfb0bbd0b8d1a4b3166797 [INFO] running `Command { std: "docker" "start" "-a" "5317e0f1b080499c302bbb9695481c7e315eafb43fcfb0bbd0b8d1a4b3166797", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling libc v0.2.132 [INFO] [stderr] Compiling crossbeam-utils v0.8.11 [INFO] [stderr] Checking once_cell v1.14.0 [INFO] [stderr] Compiling proc-macro2 v1.0.43 [INFO] [stderr] Compiling quote v1.0.21 [INFO] [stderr] Compiling unicode-ident v1.0.3 [INFO] [stderr] Compiling syn v1.0.99 [INFO] [stderr] Compiling rayon-core v1.9.3 [INFO] [stderr] Compiling crc32fast v1.3.2 [INFO] [stderr] Checking miniz_oxide v0.5.3 [INFO] [stderr] Compiling futures-core v0.3.24 [INFO] [stderr] Checking either v1.8.0 [INFO] [stderr] Checking futures-sink v0.3.24 [INFO] [stderr] Checking adler32 v1.2.0 [INFO] [stderr] Checking weezl v0.1.7 [INFO] [stderr] Checking deflate v1.0.0 [INFO] [stderr] Checking bit_field v0.10.1 [INFO] [stderr] Checking ppv-lite86 v0.2.17 [INFO] [stderr] Compiling memoffset v0.6.5 [INFO] [stderr] Compiling crossbeam-epoch v0.9.10 [INFO] [stderr] Compiling lock_api v0.4.8 [INFO] [stderr] Checking crossbeam-channel v0.5.6 [INFO] [stderr] Compiling num-traits v0.2.15 [INFO] [stderr] Compiling rayon v1.5.3 [INFO] [stderr] Checking num_cpus v1.13.1 [INFO] [stderr] Checking getrandom v0.2.7 [INFO] [stderr] Compiling num-integer v0.1.45 [INFO] [stderr] Checking crossbeam-deque v0.8.2 [INFO] [stderr] Checking nanorand v0.7.0 [INFO] [stderr] Checking spin v0.9.4 [INFO] [stderr] Compiling num-rational v0.4.1 [INFO] [stderr] Checking threadpool v1.8.1 [INFO] [stderr] Checking rand_core v0.6.4 [INFO] [stderr] Checking flate2 v1.0.24 [INFO] [stderr] Checking half v1.8.2 [INFO] [stderr] Checking smallvec v1.9.0 [INFO] [stderr] Checking png v0.17.5 [INFO] [stderr] Checking gif v0.11.4 [INFO] [stderr] Checking rand_chacha v0.3.1 [INFO] [stderr] Checking scoped_threadpool v0.1.9 [INFO] [stderr] Checking bytemuck v1.12.1 [INFO] [stderr] Checking byteorder v1.4.3 [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking jpeg-decoder v0.2.6 [INFO] [stderr] Compiling pin-project-internal v1.0.12 [INFO] [stderr] Checking tiff v0.7.3 [INFO] [stderr] Checking pin-project v1.0.12 [INFO] [stderr] Checking flume v0.10.14 [INFO] [stderr] Checking exr v1.5.0 [INFO] [stderr] Checking image v0.24.3 [INFO] [stderr] Checking rustmazecreator v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: this import is redundant [INFO] [stdout] --> src/main.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | use rand; [INFO] [stdout] | ^^^^^^^^^ help: remove it entirely [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports [INFO] [stdout] = note: `#[warn(clippy::single_component_path_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `path_color` and `background_color` are never read [INFO] [stdout] --> src/main.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 10 | struct Grid { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] ... [INFO] [stdout] 14 | path_color: Rgb, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 15 | background_color: Rgb [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this boolean expression can be simplified [INFO] [stdout] --> src/main.rs:37:20 [INFO] [stdout] | [INFO] [stdout] 37 | if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool [INFO] [stdout] = note: `#[warn(clippy::nonminimal_bool)]` on by default [INFO] [stdout] help: try [INFO] [stdout] | [INFO] [stdout] 37 - if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] 37 + if !(col != 1 || row != 0 && row != 1) || row == width-1 && col == height-2 { [INFO] [stdout] | [INFO] [stdout] 37 - if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] 37 + if (row == 1 || row == 0) && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:38:33 [INFO] [stdout] | [INFO] [stdout] 38 | p.set_color(path_color.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `path_color` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] = note: `#[warn(clippy::clone_on_copy)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:40:33 [INFO] [stdout] | [INFO] [stdout] 40 | p.set_color(back_color.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `back_color` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `(u16, u16)` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:110:29 [INFO] [stdout] | [INFO] [stdout] 110 | choose.push(n.clone()); [INFO] [stdout] | ^^^^^^^^^ help: try dereferencing it: `*n` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: length comparison to zero [INFO] [stdout] --> src/main.rs:115:12 [INFO] [stdout] | [INFO] [stdout] 115 | if choose.len() == 0 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `choose.is_empty()` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero [INFO] [stdout] = note: `#[warn(clippy::len_zero)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: manual implementation of `Option::map` [INFO] [stdout] --> src/main.rs:120:9 [INFO] [stdout] | [INFO] [stdout] 120 | / match choose.get(index as usize) { [INFO] [stdout] 121 | | None => { [INFO] [stdout] 122 | | None [INFO] [stdout] 123 | | }, [INFO] [stdout] ... | [INFO] [stdout] 127 | | } [INFO] [stdout] | |_________^ help: try: `choose.get(index as usize).map(|pos| pos.to_owned())` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map [INFO] [stdout] = note: `#[warn(clippy::manual_map)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:190:43 [INFO] [stdout] | [INFO] [stdout] 190 | neighbor.tile_color = path_rgb.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*path_rgb` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:195:35 [INFO] [stdout] | [INFO] [stdout] 195 | wall.tile_color = path_rgb.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*path_rgb` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | img.save("maze.png"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 58 | let _ = img.save("maze.png"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this import is redundant [INFO] [stdout] --> src/main.rs:2:1 [INFO] [stdout] | [INFO] [stdout] 2 | use rand; [INFO] [stdout] | ^^^^^^^^^ help: remove it entirely [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_component_path_imports [INFO] [stdout] = note: `#[warn(clippy::single_component_path_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `path_color` and `background_color` are never read [INFO] [stdout] --> src/main.rs:14:5 [INFO] [stdout] | [INFO] [stdout] 10 | struct Grid { [INFO] [stdout] | ---- fields in this struct [INFO] [stdout] ... [INFO] [stdout] 14 | path_color: Rgb, [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] 15 | background_color: Rgb [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: this boolean expression can be simplified [INFO] [stdout] --> src/main.rs:37:20 [INFO] [stdout] | [INFO] [stdout] 37 | if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool [INFO] [stdout] = note: `#[warn(clippy::nonminimal_bool)]` on by default [INFO] [stdout] help: try [INFO] [stdout] | [INFO] [stdout] 37 - if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] 37 + if !(col != 1 || row != 0 && row != 1) || row == width-1 && col == height-2 { [INFO] [stdout] | [INFO] [stdout] 37 - if row == 0 && col == 1 || row == 1 && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] 37 + if (row == 1 || row == 0) && col == 1 || row == width-1 && col == height-2 { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:38:33 [INFO] [stdout] | [INFO] [stdout] 38 | p.set_color(path_color.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `path_color` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] = note: `#[warn(clippy::clone_on_copy)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:40:33 [INFO] [stdout] | [INFO] [stdout] 40 | p.set_color(back_color.clone()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `back_color` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `(u16, u16)` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:110:29 [INFO] [stdout] | [INFO] [stdout] 110 | choose.push(n.clone()); [INFO] [stdout] | ^^^^^^^^^ help: try dereferencing it: `*n` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: length comparison to zero [INFO] [stdout] --> src/main.rs:115:12 [INFO] [stdout] | [INFO] [stdout] 115 | if choose.len() == 0 { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `choose.is_empty()` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero [INFO] [stdout] = note: `#[warn(clippy::len_zero)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: manual implementation of `Option::map` [INFO] [stdout] --> src/main.rs:120:9 [INFO] [stdout] | [INFO] [stdout] 120 | / match choose.get(index as usize) { [INFO] [stdout] 121 | | None => { [INFO] [stdout] 122 | | None [INFO] [stdout] 123 | | }, [INFO] [stdout] ... | [INFO] [stdout] 127 | | } [INFO] [stdout] | |_________^ help: try: `choose.get(index as usize).map(|pos| pos.to_owned())` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_map [INFO] [stdout] = note: `#[warn(clippy::manual_map)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:190:43 [INFO] [stdout] | [INFO] [stdout] 190 | neighbor.tile_color = path_rgb.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*path_rgb` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: using `clone` on type `Rgb` which implements the `Copy` trait [INFO] [stdout] --> src/main.rs:195:35 [INFO] [stdout] | [INFO] [stdout] 195 | wall.tile_color = path_rgb.clone(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^ help: try dereferencing it: `*path_rgb` [INFO] [stdout] | [INFO] [stdout] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:58:9 [INFO] [stdout] | [INFO] [stdout] 58 | img.save("maze.png"); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 58 | let _ = img.save("maze.png"); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 23.18s [INFO] running `Command { std: "docker" "inspect" "5317e0f1b080499c302bbb9695481c7e315eafb43fcfb0bbd0b8d1a4b3166797", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5317e0f1b080499c302bbb9695481c7e315eafb43fcfb0bbd0b8d1a4b3166797", kill_on_drop: false }` [INFO] [stdout] 5317e0f1b080499c302bbb9695481c7e315eafb43fcfb0bbd0b8d1a4b3166797