[INFO] cloning repository https://github.com/dabhaid/aoc-rust-22
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dabhaid/aoc-rust-22" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdabhaid%2Faoc-rust-22", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdabhaid%2Faoc-rust-22'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fd33eceafc493268570b1f5e2be79c83edea071e
[INFO] linting dabhaid/aoc-rust-22 against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdabhaid%2Faoc-rust-22" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-2-tc1/source/.cargo/config
[INFO] started tweaking git repo https://github.com/dabhaid/aoc-rust-22
[INFO] finished tweaking git repo https://github.com/dabhaid/aoc-rust-22
[INFO] tweaked toml for git repo https://github.com/dabhaid/aoc-rust-22 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dabhaid/aoc-rust-22 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/dabhaid/aoc-rust-22 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded array2d v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 5b3b192261230938d48e51503177512b5ae57a02816000ecc4890ddc06c891aa
[INFO] running `Command { std: "docker" "start" "-a" "5b3b192261230938d48e51503177512b5ae57a02816000ecc4890ddc06c891aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b3b192261230938d48e51503177512b5ae57a02816000ecc4890ddc06c891aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b3b192261230938d48e51503177512b5ae57a02816000ecc4890ddc06c891aa", kill_on_drop: false }`
[INFO] [stdout] 5b3b192261230938d48e51503177512b5ae57a02816000ecc4890ddc06c891aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 53f6fb4ea2bc18b351251167ddfc44268d2a9e14923d908e7f9b2846296a780f
[INFO] running `Command { std: "docker" "start" "-a" "53f6fb4ea2bc18b351251167ddfc44268d2a9e14923d908e7f9b2846296a780f", kill_on_drop: false }`
[INFO] [stderr]     Checking array2d v0.2.1
[INFO] [stderr]     Checking pico-args v0.5.0
[INFO] [stderr]     Checking advent_of_code v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/bin/02.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     return HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)]);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]   = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 5 -     return HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)]);
[INFO] [stdout] 5 +     HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)])
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     return HashMap::from([
[INFO] [stdout] 10 | |         ("AX", "D"),
[INFO] [stdout] 11 | |         ("AY", "W"),
[INFO] [stdout] 12 | |         ("AZ", "L"),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         ("CZ", "D"),
[INFO] [stdout] 19 | |     ]);
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout]  9 ~     HashMap::from([
[INFO] [stdout] 10 +         ("AX", "D"),
[INFO] [stdout] 11 +         ("AY", "W"),
[INFO] [stdout] 12 +         ("AZ", "L"),
[INFO] [stdout] 13 +         ("BX", "L"),
[INFO] [stdout] 14 +         ("BY", "D"),
[INFO] [stdout] 15 +         ("BZ", "W"),
[INFO] [stdout] 16 +         ("CX", "W"),
[INFO] [stdout] 17 +         ("CY", "L"),
[INFO] [stdout] 18 +         ("CZ", "D"),
[INFO] [stdout] 19 ~     ])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     return HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -     return HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)]);
[INFO] [stdout] 23 +     HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     return HashMap::from([
[INFO] [stdout] 29 | |         ("AX", "C"),
[INFO] [stdout] 30 | |         ("AY", "A"),
[INFO] [stdout] 31 | |         ("AZ", "B"),
[INFO] [stdout] ...  |
[INFO] [stdout] 37 | |         ("CZ", "A"),
[INFO] [stdout] 38 | |     ]);
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 28 ~     HashMap::from([
[INFO] [stdout] 29 +         ("AX", "C"),
[INFO] [stdout] 30 +         ("AY", "A"),
[INFO] [stdout] 31 +         ("AZ", "B"),
[INFO] [stdout] 32 +         ("BX", "A"),
[INFO] [stdout] 33 +         ("BY", "B"),
[INFO] [stdout] 34 +         ("BZ", "C"),
[INFO] [stdout] 35 +         ("CX", "B"),
[INFO] [stdout] 36 +         ("CY", "C"),
[INFO] [stdout] 37 +         ("CZ", "A"),
[INFO] [stdout] 38 ~     ])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     return Array2D::from_rows(&vecs);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 -     return Array2D::from_rows(&vecs);
[INFO] [stdout] 49 +     Array2D::from_rows(&vecs)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | /     return Some(score(
[INFO] [stdout] 54 | |         &format_input(input),
[INFO] [stdout] 55 | |         get_scores_pt1(),
[INFO] [stdout] 56 | |         get_outcome_pt1(),
[INFO] [stdout] 57 | |     ));
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 53 ~     Some(score(
[INFO] [stdout] 54 +         &format_input(input),
[INFO] [stdout] 55 +         get_scores_pt1(),
[INFO] [stdout] 56 +         get_outcome_pt1(),
[INFO] [stdout] 57 ~     ))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     return Some(score(
[INFO] [stdout] 62 | |         &format_input(_input),
[INFO] [stdout] 63 | |         get_scores_pt2(),
[INFO] [stdout] 64 | |         get_outcome_pt2(),
[INFO] [stdout] 65 | |     ));
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 61 ~     Some(score(
[INFO] [stdout] 62 +         &format_input(_input),
[INFO] [stdout] 63 +         get_scores_pt2(),
[INFO] [stdout] 64 +         get_outcome_pt2(),
[INFO] [stdout] 65 ~     ))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     return _accum;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 81 -     return _accum;
[INFO] [stdout] 81 +     _accum
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/bin/01.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     return Some(summed_sacks[summed_sacks.len() - 1]);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]   = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 4 -     return Some(summed_sacks[summed_sacks.len() - 1]);
[INFO] [stdout] 4 +     Some(summed_sacks[summed_sacks.len() - 1])
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 11 -     return Some(accum);
[INFO] [stdout] 11 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return Some(summed_sacks.iter().rev().take(3).sum());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 10 -     return Some(summed_sacks.iter().rev().take(3).sum());
[INFO] [stdout] 10 +     Some(summed_sacks.iter().rev().take(3).sum())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 22 -     return Some(accum);
[INFO] [stdout] 22 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     return results;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 42 -     return results;
[INFO] [stdout] 42 +     results
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return elfsum;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return elfsum;
[INFO] [stdout] 18 +     elfsum
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return elves;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return elves;
[INFO] [stdout] 32 +     elves
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]   --> src/bin/01.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |         if line != "" {
[INFO] [stdout]    |            ^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!line.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]    = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/bin/02.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     return HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)]);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]   = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 5 -     return HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)]);
[INFO] [stdout] 5 +     HashMap::from([("X", 1), ("Y", 2), ("Z", 3), ("W", 6), ("D", 3), ("L", 0)])
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `row` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for row in 0..rows {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 11 -     for row in 0..rows {
[INFO] [stdout] 11 +     for <item> in visible.iter_mut().take(rows) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | /     return HashMap::from([
[INFO] [stdout] 10 | |         ("AX", "D"),
[INFO] [stdout] 11 | |         ("AY", "W"),
[INFO] [stdout] 12 | |         ("AZ", "L"),
[INFO] [stdout] ...  |
[INFO] [stdout] 18 | |         ("CZ", "D"),
[INFO] [stdout] 19 | |     ]);
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout]  9 ~     HashMap::from([
[INFO] [stdout] 10 +         ("AX", "D"),
[INFO] [stdout] 11 +         ("AY", "W"),
[INFO] [stdout] 12 +         ("AZ", "L"),
[INFO] [stdout] 13 +         ("BX", "L"),
[INFO] [stdout] 14 +         ("BY", "D"),
[INFO] [stdout] 15 +         ("BZ", "W"),
[INFO] [stdout] 16 +         ("CX", "W"),
[INFO] [stdout] 17 +         ("CY", "L"),
[INFO] [stdout] 18 +         ("CZ", "D"),
[INFO] [stdout] 19 ~     ])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for i in 0..cols {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 19 -     for i in 0..cols {
[INFO] [stdout] 19 +     for <item> in visible.iter_mut().take(cols) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]   --> src/bin/08.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |             for i in 0..row {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 27 -             for i in 0..row {
[INFO] [stdout] 27 +             for <item> in grid.iter().take(row) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]   --> src/bin/08.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |             for i in (row + 1)..rows {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 37 -             for i in (row + 1)..rows {
[INFO] [stdout] 37 +             for <item> in grid.iter().take(rows).skip((row + 1)) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     return HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)]);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 23 -     return HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)]);
[INFO] [stdout] 23 +     HashMap::from([("X", 0), ("Y", 3), ("Z", 6), ("A", 1), ("B", 2), ("C", 3)])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `row` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:83:16
[INFO] [stdout]    |
[INFO] [stdout] 83 |     for row in 0..rows {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 83 -     for row in 0..rows {
[INFO] [stdout] 83 +     for <item> in visible.iter_mut().take(rows) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | /     return HashMap::from([
[INFO] [stdout] 29 | |         ("AX", "C"),
[INFO] [stdout] 30 | |         ("AY", "A"),
[INFO] [stdout] 31 | |         ("AZ", "B"),
[INFO] [stdout] ...  |
[INFO] [stdout] 37 | |         ("CZ", "A"),
[INFO] [stdout] 38 | |     ]);
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 28 ~     HashMap::from([
[INFO] [stdout] 29 +         ("AX", "C"),
[INFO] [stdout] 30 +         ("AY", "A"),
[INFO] [stdout] 31 +         ("AZ", "B"),
[INFO] [stdout] 32 +         ("BX", "A"),
[INFO] [stdout] 33 +         ("BY", "B"),
[INFO] [stdout] 34 +         ("BZ", "C"),
[INFO] [stdout] 35 +         ("CX", "B"),
[INFO] [stdout] 36 +         ("CY", "C"),
[INFO] [stdout] 37 +         ("CZ", "A"),
[INFO] [stdout] 38 ~     ])
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |     for i in 0..cols {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 91 -     for i in 0..cols {
[INFO] [stdout] 91 +     for <item> in visible.iter_mut().take(cols) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]    --> src/bin/08.rs:100:22
[INFO] [stdout]     |
[INFO] [stdout] 100 |             for i in 0..row {
[INFO] [stdout]     |                      ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 100 -             for i in 0..row {
[INFO] [stdout] 100 +             for <item> in grid.iter().take(row) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     return Array2D::from_rows(&vecs);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 49 -     return Array2D::from_rows(&vecs);
[INFO] [stdout] 49 +     Array2D::from_rows(&vecs)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]    --> src/bin/08.rs:114:22
[INFO] [stdout]     |
[INFO] [stdout] 114 |             for i in (row + 1)..rows {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 114 -             for i in (row + 1)..rows {
[INFO] [stdout] 114 +             for <item> in grid.iter().take(rows).skip((row + 1)) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/bin/05.rs:85:11
[INFO] [stdout]    |
[INFO] [stdout] 85 |     while !line.is_none() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ help: try: `line.is_some()`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded late initialization
[INFO] [stdout]   --> src/bin/05.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let element;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
[INFO] [stdout]    = note: `#[warn(clippy::needless_late_init)]` on by default
[INFO] [stdout] help: move the declaration `element` here and remove the assignments from the branches
[INFO] [stdout]    |
[INFO] [stdout] 87 ~             
[INFO] [stdout] 88 |             let index: usize = i.try_into().unwrap();
[INFO] [stdout] 89 ~             let element = if i == 0 {
[INFO] [stdout] 90 ~                 line.unwrap().chars().nth(index + 1).unwrap()
[INFO] [stdout] 91 |             } else {
[INFO] [stdout] 92 ~                 line.unwrap().chars().nth(1 + (4 * index)).unwrap()
[INFO] [stdout] 93 ~             };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 11 -     return Some(accum);
[INFO] [stdout] 11 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 22 -     return Some(accum);
[INFO] [stdout] 22 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/04.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     return results;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 42 -     return results;
[INFO] [stdout] 42 +     results
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:53:5
[INFO] [stdout]    |
[INFO] [stdout] 53 | /     return Some(score(
[INFO] [stdout] 54 | |         &format_input(input),
[INFO] [stdout] 55 | |         get_scores_pt1(),
[INFO] [stdout] 56 | |         get_outcome_pt1(),
[INFO] [stdout] 57 | |     ));
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 53 ~     Some(score(
[INFO] [stdout] 54 +         &format_input(input),
[INFO] [stdout] 55 +         get_scores_pt1(),
[INFO] [stdout] 56 +         get_outcome_pt1(),
[INFO] [stdout] 57 ~     ))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 | /     return Some(score(
[INFO] [stdout] 62 | |         &format_input(_input),
[INFO] [stdout] 63 | |         get_scores_pt2(),
[INFO] [stdout] 64 | |         get_outcome_pt2(),
[INFO] [stdout] 65 | |     ));
[INFO] [stdout]    | |______^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 61 ~     Some(score(
[INFO] [stdout] 62 +         &format_input(_input),
[INFO] [stdout] 63 +         get_scores_pt2(),
[INFO] [stdout] 64 +         get_outcome_pt2(),
[INFO] [stdout] 65 ~     ))
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/02.rs:81:5
[INFO] [stdout]    |
[INFO] [stdout] 81 |     return _accum;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 81 -     return _accum;
[INFO] [stdout] 81 +     _accum
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]  --> src/bin/01.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     return Some(summed_sacks[summed_sacks.len() - 1]);
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]   = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]   |
[INFO] [stdout] 4 -     return Some(summed_sacks[summed_sacks.len() - 1]);
[INFO] [stdout] 4 +     Some(summed_sacks[summed_sacks.len() - 1])
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     return Some(summed_sacks.iter().rev().take(3).sum());
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 10 -     return Some(summed_sacks.iter().rev().take(3).sum());
[INFO] [stdout] 10 +     Some(summed_sacks.iter().rev().take(3).sum())
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return elfsum;
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return elfsum;
[INFO] [stdout] 18 +     elfsum
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/01.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     return elves;
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 32 -     return elves;
[INFO] [stdout] 32 +     elves
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]   --> src/bin/01.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |         if line != "" {
[INFO] [stdout]    |            ^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!line.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]    = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/bin/scaffold.rs:53:36
[INFO] [stdout]    |
[INFO] [stdout] 53 |     OpenOptions::new().write(true).create(true).open(path)
[INFO] [stdout]    |                                    ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout]    = note: `#[warn(clippy::suspicious_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/07.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 13 -     return Some(accum);
[INFO] [stdout] 13 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/bin/07.rs:39:11
[INFO] [stdout]    |
[INFO] [stdout] 39 |     while split != None {
[INFO] [stdout]    |           ^^^^^^^^^^^^^ help: use `Option::is_some()` instead: `split.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout]    = note: `#[warn(clippy::partialeq_to_none)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u64` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/07.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |             delta = (dir.1 - space_to_reclaim).clone();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `(dir.1 - space_to_reclaim)`
[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: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/bin/12.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 |     if (level == 'r') {
[INFO] [stdout]     |        ^            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 119 -     if (level == 'r') {
[INFO] [stdout] 119 +     if level == 'r'  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stdout]    --> src/bin/12.rs:171:8
[INFO] [stdout]     |
[INFO] [stdout] 171 |     if current.0 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change it to: `current.0 as i32 > 0 as i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stdout]     = note: `#[warn(clippy::int_plus_one)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stdout]    --> src/bin/12.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 |     if current.1 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change it to: `current.1 as i32 > 0 as i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/bin/05.rs:85:11
[INFO] [stdout]    |
[INFO] [stdout] 85 |     while !line.is_none() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ help: try: `line.is_some()`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded late initialization
[INFO] [stdout]   --> src/bin/05.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |             let element;
[INFO] [stdout]    |             ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
[INFO] [stdout]    = note: `#[warn(clippy::needless_late_init)]` on by default
[INFO] [stdout] help: move the declaration `element` here and remove the assignments from the branches
[INFO] [stdout]    |
[INFO] [stdout] 87 ~             
[INFO] [stdout] 88 |             let index: usize = i.try_into().unwrap();
[INFO] [stdout] 89 ~             let element = if i == 0 {
[INFO] [stdout] 90 ~                 line.unwrap().chars().nth(index + 1).unwrap()
[INFO] [stdout] 91 |             } else {
[INFO] [stdout] 92 ~                 line.unwrap().chars().nth(1 + (4 * index)).unwrap()
[INFO] [stdout] 93 ~             };
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: file opened with `create`, but `truncate` behavior not defined
[INFO] [stdout]   --> src/bin/scaffold.rs:53:36
[INFO] [stdout]    |
[INFO] [stdout] 53 |     OpenOptions::new().write(true).create(true).open(path)
[INFO] [stdout]    |                                    ^^^^^^^^^^^^- help: add: `.truncate(true)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you intend to overwrite an existing file entirely, call `.truncate(true)`
[INFO] [stdout]    = help: if you instead know that you may want to keep some parts of the old file, call `.truncate(false)`
[INFO] [stdout]    = help: alternatively, use `.append(true)` to append to the file instead of overwriting it
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#suspicious_open_options
[INFO] [stdout]    = note: `#[warn(clippy::suspicious_open_options)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Coordinate`
[INFO] [stdout]   --> src/bin/09.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     pub fn new() -> Coordinate {
[INFO] [stdout] 11 | |         return Coordinate { x: 0, y: 0 };
[INFO] [stdout] 12 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout]  9 + impl Default for Coordinate {
[INFO] [stdout] 10 +     fn default() -> Self {
[INFO] [stdout] 11 +         Self::new()
[INFO] [stdout] 12 +     }
[INFO] [stdout] 13 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/09.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         return Coordinate { x: 0, y: 0 };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 11 -         return Coordinate { x: 0, y: 0 };
[INFO] [stdout] 11 +         Coordinate { x: 0, y: 0 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/09.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         return Coordinate {
[INFO] [stdout] 26 | |             x: other.x - self.x,
[INFO] [stdout] 27 | |             y: other.y - self.y,
[INFO] [stdout] 28 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 ~         Coordinate {
[INFO] [stdout] 26 +             x: other.x - self.x,
[INFO] [stdout] 27 +             y: other.y - self.y,
[INFO] [stdout] 28 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary operation
[INFO] [stdout]    --> src/bin/09.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             &knots[0].advance(&m.0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `knots[0].advance(&m.0);`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_operation)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Coordinate` which implements the `Copy` trait
[INFO] [stdout]    --> src/bin/09.rs:104:37
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 let relative_head = knots[i - 1].clone();
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `knots[i - 1]`
[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 `print!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/bin/10.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             print!("Clock tick{}: {}\n", clock, clock * x);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stdout]    = note: `#[warn(clippy::print_with_newline)]` on by default
[INFO] [stdout] help: use `println!` instead
[INFO] [stdout]    |
[INFO] [stdout] 29 -             print!("Clock tick{}: {}\n", clock, clock * x);
[INFO] [stdout] 29 +             println!("Clock tick{}: {}", clock, clock * x);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/10.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         return self.line == other.line;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 43 -         return self.line == other.line;
[INFO] [stdout] 43 +         self.line == other.line
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/10.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         return matching == 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -         return matching == 0;
[INFO] [stdout] 59 +         matching == 0
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/09.rs:158:29
[INFO] [stdout]     |
[INFO] [stdout] 158 |         assert_eq!(part_two(&input), Some(36));
[INFO] [stdout]     |                             ^^^^^^ help: change this to: `input`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]     = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/bin/09.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut knots = vec![Coordinate::new(); 10];
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[Coordinate::new(); 10]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]    = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/bin/09.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             &knots[0].advance(&m.0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[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] 102 |             let _ = &knots[0].advance(&m.0);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of `Iterator::fold` on a type that implements `Try`
[INFO] [stdout]   --> src/bin/10.rs:69:23
[INFO] [stdout]    |
[INFO] [stdout] 69 |           self.0.iter().fold(Ok(()), |result, line| {
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 70 | |             result.and_then(|_| writeln!(f, "{}", line))
[INFO] [stdout] 71 | |         })
[INFO] [stdout]    | |__________^ help: use `try_fold` instead: `try_fold((), |result, line| ...)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold
[INFO] [stdout]    = note: `#[warn(clippy::manual_try_fold)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used a field initializer for a tuple struct
[INFO] [stdout]   --> src/bin/10.rs:82:28
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut lines: Lines = Lines { 0: Vec::new() };
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^ help: use tuple initialization: `Lines(Vec::new())`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#init_numbered_fields
[INFO] [stdout]    = note: `#[warn(clippy::init_numbered_fields)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/bin/12.rs:262:17
[INFO] [stdout]     |
[INFO] [stdout] 262 | pub fn part_two(input: &str) -> Option<u32> {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `Eq::assert_receiver_is_total_eq` should never be implemented by hand
[INFO] [stdout]   --> src/bin/10.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn assert_receiver_is_total_eq(&self) {}
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method was used to add checks to the `Eq` derive macro
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #152336 <https://github.com/rust-lang/rust/issues/152336>
[INFO] [stdout]    = note: `#[warn(internal_eq_trait_method_impls)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `char` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/12.rs:64:29
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 let label = array_copy.get(i, j).unwrap().clone();
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*array_copy.get(i, j).unwrap()`
[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: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stdout]   --> src/bin/12.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 | /                 if !hashmap.contains_key(&label) {
[INFO] [stdout] 67 | |                     hashmap.insert(label, vec![blob]);
[INFO] [stdout] 68 | |                 } else {
[INFO] [stdout] 69 | |                     hashmap.get_mut(&label).unwrap().push(blob);
[INFO] [stdout] 70 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stdout]    = note: `#[warn(clippy::map_entry)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 66 ~                 if let std::collections::hash_map::Entry::Vacant(e) = hashmap.entry(label) {
[INFO] [stdout] 67 +                     e.insert(vec![blob]);
[INFO] [stdout] 68 +                 } else {
[INFO] [stdout] 69 +                     hashmap.get_mut(&label).unwrap().push(blob);
[INFO] [stdout] 70 +                 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/12.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     return blob;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 94 -     return blob;
[INFO] [stdout] 94 +     blob
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `char` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/12.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let label = array.get(coord.0, coord.1).unwrap().clone();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*array.get(coord.0, coord.1).unwrap()`
[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: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/bin/12.rs:88:39
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let neighbors = get_neighbors(&array, point, &label);
[INFO] [stdout]    |                                       ^^^^^^ help: change this to: `array`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `uplevel_blobs`
[INFO] [stdout]    --> src/bin/12.rs:106:14
[INFO] [stdout]     |
[INFO] [stdout] 106 |     for i in 0..uplevel_blobs.len() {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]     = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 106 -     for i in 0..uplevel_blobs.len() {
[INFO] [stdout] 106 +     for (i, <item>) in uplevel_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 | /         match find_connection(&current_blob, &uplevel_blobs[i]) {
[INFO] [stdout] 108 | |             Some(_x) => neighbors.push((next_level, i)),
[INFO] [stdout] 109 | |             None => (),
[INFO] [stdout] 110 | |         }
[INFO] [stdout]     | |_________^ help: try: `if let Some(_x) = find_connection(&current_blob, &uplevel_blobs[i]) { neighbors.push((next_level, i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]     = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:107:31
[INFO] [stdout]     |
[INFO] [stdout] 107 |         match find_connection(&current_blob, &uplevel_blobs[i]) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `downlevel_blobs`
[INFO] [stdout]    --> src/bin/12.rs:112:14
[INFO] [stdout]     |
[INFO] [stdout] 112 |     for i in 0..downlevel_blobs.len() {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 112 -     for i in 0..downlevel_blobs.len() {
[INFO] [stdout] 112 +     for (i, <item>) in downlevel_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 | /         match find_connection(&current_blob, &downlevel_blobs[i]) {
[INFO] [stdout] 114 | |             Some(_x) => neighbors.push((previous_level, i)),
[INFO] [stdout] 115 | |             None => (),
[INFO] [stdout] 116 | |         }
[INFO] [stdout]     | |_________^ help: try: `if let Some(_x) = find_connection(&current_blob, &downlevel_blobs[i]) { neighbors.push((previous_level, i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:113:31
[INFO] [stdout]     |
[INFO] [stdout] 113 |         match find_connection(&current_blob, &downlevel_blobs[i]) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `l2_blobs`
[INFO] [stdout]    --> src/bin/12.rs:121:18
[INFO] [stdout]     |
[INFO] [stdout] 121 |         for i in 0..l2_blobs.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 121 -         for i in 0..l2_blobs.len() {
[INFO] [stdout] 121 +         for (i, <item>) in l2_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 | /             match find_connection(&current_blob, &l2_blobs[i]) {
[INFO] [stdout] 123 | |                 Some(_x) => neighbors.push((prev_level(previous_level), i)),
[INFO] [stdout] 124 | |                 None => (),
[INFO] [stdout] 125 | |             }
[INFO] [stdout]     | |_____________^ help: try: `if let Some(_x) = find_connection(&current_blob, &l2_blobs[i]) { neighbors.push((prev_level(previous_level), i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:122:35
[INFO] [stdout]     |
[INFO] [stdout] 122 |             match find_connection(&current_blob, &l2_blobs[i]) {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:140:5
[INFO] [stdout]     |
[INFO] [stdout] 140 | /     if point.0 + 1 < rows {
[INFO] [stdout] 141 | |         if array.get(point.0 + 1, point.1).unwrap() == label {
[INFO] [stdout] 142 | |             neighbors.push((point.0 + 1, point.1));
[INFO] [stdout] 143 | |         }
[INFO] [stdout] 144 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 140 ~     if point.0 + 1 < rows
[INFO] [stdout] 141 ~         && array.get(point.0 + 1, point.1).unwrap() == label {
[INFO] [stdout] 142 |             neighbors.push((point.0 + 1, point.1));
[INFO] [stdout] 143 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | /     if point.0 as i32 - 1 > 0 {
[INFO] [stdout] 147 | |         if array.get(point.0 - 1, point.1).unwrap() == label {
[INFO] [stdout] 148 | |             neighbors.push((point.0 - 1, point.1));
[INFO] [stdout] 149 | |         }
[INFO] [stdout] 150 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 146 ~     if point.0 as i32 - 1 > 0
[INFO] [stdout] 147 ~         && array.get(point.0 - 1, point.1).unwrap() == label {
[INFO] [stdout] 148 |             neighbors.push((point.0 - 1, point.1));
[INFO] [stdout] 149 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     if point.1 + 1 < cols {
[INFO] [stdout] 153 | |         if array.get(point.0, point.1 + 1).unwrap() == label {
[INFO] [stdout] 154 | |             neighbors.push((point.0, point.1 + 1));
[INFO] [stdout] 155 | |         }
[INFO] [stdout] 156 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 152 ~     if point.1 + 1 < cols
[INFO] [stdout] 153 ~         && array.get(point.0, point.1 + 1).unwrap() == label {
[INFO] [stdout] 154 |             neighbors.push((point.0, point.1 + 1));
[INFO] [stdout] 155 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 158 | /     if (point.1 as i32) - 1 > 0 {
[INFO] [stdout] 159 | |         if array.get(point.0, point.1 - 1).unwrap() == label {
[INFO] [stdout] 160 | |             neighbors.push((point.0, point.1 - 1));
[INFO] [stdout] 161 | |         }
[INFO] [stdout] 162 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 158 ~     if (point.1 as i32) - 1 > 0
[INFO] [stdout] 159 ~         && array.get(point.0, point.1 - 1).unwrap() == label {
[INFO] [stdout] 160 |             neighbors.push((point.0, point.1 - 1));
[INFO] [stdout] 161 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i32` is unnecessary
[INFO] [stdout]    --> src/bin/12.rs:171:32
[INFO] [stdout]     |
[INFO] [stdout] 171 |     if current.0 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |                                ^^^^^^^^ help: try: `0_i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i32` is unnecessary
[INFO] [stdout]    --> src/bin/12.rs:177:32
[INFO] [stdout]     |
[INFO] [stdout] 177 |     if current.1 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |                                ^^^^^^^^ help: try: `0_i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/bin/12.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     return (x.abs() + y.abs()) as u32;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 230 -     return (x.abs() + y.abs()) as u32;
[INFO] [stdout] 230 +     (x.abs() + y.abs()) as u32
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]    --> src/bin/12.rs:273:5
[INFO] [stdout]     |
[INFO] [stdout] 272 |     let array = Array2D::from_rows(&rows);
[INFO] [stdout]     |     -------------------------------------- unnecessary `let` binding
[INFO] [stdout] 273 |     array
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]     = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]     |
[INFO] [stdout] 272 ~     
[INFO] [stdout] 273 ~     Array2D::from_rows(&rows)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/11.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let mut monkey = &mut monkeys[index];
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `x` is only used to index `monkeys`
[INFO] [stdout]  --> src/bin/11.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |     for x in 0..monkeys.len() {
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]   = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]   |
[INFO] [stdout] 9 -     for x in 0..monkeys.len() {
[INFO] [stdout] 9 +     for <item> in &monkeys {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/bin/11.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         cap = cap * monkeys[x].divis;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cap *= monkeys[x].divis`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout]    = note: `#[warn(clippy::assign_op_pattern)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/bin/11.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 item = item % cap;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `item %= cap`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/bin/11.rs:33:23
[INFO] [stdout]    |
[INFO] [stdout] 33 |                 match item % monkeys[i].divis == 0 {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `item.is_multiple_of(monkeys[i].divis)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]    = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `monkeys`
[INFO] [stdout]   --> src/bin/11.rs:47:14
[INFO] [stdout]    |
[INFO] [stdout] 47 |     for i in 0..monkeys.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 47 -     for i in 0..monkeys.len() {
[INFO] [stdout] 47 +     for <item> in &monkeys {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Monkey`
[INFO] [stdout]   --> src/bin/11.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | /     pub fn new() -> Monkey {
[INFO] [stdout] 72 | |         Monkey {
[INFO] [stdout] 73 | |             items: Vec::new(),
[INFO] [stdout] 74 | |             operations: String::new(),
[INFO] [stdout] ...  |
[INFO] [stdout] 80 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 70 + impl Default for Monkey {
[INFO] [stdout] 71 +     fn default() -> Self {
[INFO] [stdout] 72 +         Self::new()
[INFO] [stdout] 73 +     }
[INFO] [stdout] 74 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/bin/11.rs:89:11
[INFO] [stdout]    |
[INFO] [stdout] 89 |     while !line.is_none() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ help: try: `line.is_some()`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]    --> src/bin/11.rs:106:20
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 if l == "" {
[INFO] [stdout]     |                    ^^^^^^^ help: using `is_empty` is clearer and more explicit: `l.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]     = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return Some(accum);
[INFO] [stdout] 18 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/bin/03.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |         if intersect.len() > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!intersect.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: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/bin/03.rs:14:37
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 accum += item_value(&item);
[INFO] [stdout]    |                                     ^^^^^ help: change this to: `item`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         return val - 96;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 24 ~         val - 96
[INFO] [stdout] 25 |     } else {
[INFO] [stdout] 26 |         return val - 38;
[INFO] [stdout] 27 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         return val - 38;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 26 ~         val - 38
[INFO] [stdout] 27 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 46 -     return Some(accum);
[INFO] [stdout] 46 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `packs.get(0)`
[INFO] [stdout]   --> src/bin/03.rs:35:56
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let packs0: HashSet<char> = HashSet::from_iter(packs.get(0)?.chars());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^ help: try: `packs.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]    = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]   --> src/bin/03.rs:38:41
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut common: HashSet<char> = packs0.intersection(&packs1).map(|x| *x).collect();
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `packs0.intersection(&packs1).copied()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]    = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]   --> src/bin/03.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |         common = common.intersection(&packs2).map(|x| *x).collect();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `common.intersection(&packs2).copied()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/bin/03.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |         if common.len() > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!common.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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     return Some(vecs);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 54 -     return Some(vecs);
[INFO] [stdout] 54 +     Some(vecs)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]    --> src/bin/12.rs:119:8
[INFO] [stdout]     |
[INFO] [stdout] 119 |     if (level == 'r') {
[INFO] [stdout]     |        ^            ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 119 -     if (level == 'r') {
[INFO] [stdout] 119 +     if level == 'r'  {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stdout]    --> src/bin/12.rs:171:8
[INFO] [stdout]     |
[INFO] [stdout] 171 |     if current.0 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change it to: `current.0 as i32 > 0 as i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stdout]     = note: `#[warn(clippy::int_plus_one)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary `>= y + 1` or `x - 1 >=`
[INFO] [stdout]    --> src/bin/12.rs:177:8
[INFO] [stdout]     |
[INFO] [stdout] 177 |     if current.1 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change it to: `current.1 as i32 > 0 as i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#int_plus_one
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/07.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 13 -     return Some(accum);
[INFO] [stdout] 13 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: binary comparison to literal `Option::None`
[INFO] [stdout]   --> src/bin/07.rs:39:11
[INFO] [stdout]    |
[INFO] [stdout] 39 |     while split != None {
[INFO] [stdout]    |           ^^^^^^^^^^^^^ help: use `Option::is_some()` instead: `split.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#partialeq_to_none
[INFO] [stdout]    = note: `#[warn(clippy::partialeq_to_none)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `u64` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/07.rs:58:21
[INFO] [stdout]    |
[INFO] [stdout] 58 |             delta = (dir.1 - space_to_reclaim).clone();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `(dir.1 - space_to_reclaim)`
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/bin/11.rs:110:21
[INFO] [stdout]     |
[INFO] [stdout] 110 |                 let mut monkey = &mut monkeys[index];
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you should consider adding a `Default` implementation for `Coordinate`
[INFO] [stdout]   --> src/bin/09.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | /     pub fn new() -> Coordinate {
[INFO] [stdout] 11 | |         return Coordinate { x: 0, y: 0 };
[INFO] [stdout] 12 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout]  9 + impl Default for Coordinate {
[INFO] [stdout] 10 +     fn default() -> Self {
[INFO] [stdout] 11 +         Self::new()
[INFO] [stdout] 12 +     }
[INFO] [stdout] 13 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/09.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |         return Coordinate { x: 0, y: 0 };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 11 -         return Coordinate { x: 0, y: 0 };
[INFO] [stdout] 11 +         Coordinate { x: 0, y: 0 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/09.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | /         return Coordinate {
[INFO] [stdout] 26 | |             x: other.x - self.x,
[INFO] [stdout] 27 | |             y: other.y - self.y,
[INFO] [stdout] 28 | |         };
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 ~         Coordinate {
[INFO] [stdout] 26 +             x: other.x - self.x,
[INFO] [stdout] 27 +             y: other.y - self.y,
[INFO] [stdout] 28 ~         }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary operation
[INFO] [stdout]    --> src/bin/09.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             &knots[0].advance(&m.0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `knots[0].advance(&m.0);`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_operation
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_operation)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `x` is only used to index `monkeys`
[INFO] [stdout]  --> src/bin/11.rs:9:14
[INFO] [stdout]   |
[INFO] [stdout] 9 |     for x in 0..monkeys.len() {
[INFO] [stdout]   |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]   = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]   |
[INFO] [stdout] 9 -     for x in 0..monkeys.len() {
[INFO] [stdout] 9 +     for <item> in &monkeys {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/bin/11.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         cap = cap * monkeys[x].divis;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `cap *= monkeys[x].divis`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout]    = note: `#[warn(clippy::assign_op_pattern)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of an assign operation
[INFO] [stdout]   --> src/bin/11.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 item = item % cap;
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: replace it with: `item %= cap`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: manual implementation of `.is_multiple_of()`
[INFO] [stdout]   --> src/bin/11.rs:33:23
[INFO] [stdout]    |
[INFO] [stdout] 33 |                 match item % monkeys[i].divis == 0 {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `item.is_multiple_of(monkeys[i].divis)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_is_multiple_of
[INFO] [stdout]    = note: `#[warn(clippy::manual_is_multiple_of)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `monkeys`
[INFO] [stdout]   --> src/bin/11.rs:47:14
[INFO] [stdout]    |
[INFO] [stdout] 47 |     for i in 0..monkeys.len() {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 47 -     for i in 0..monkeys.len() {
[INFO] [stdout] 47 +     for <item> in &monkeys {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `Coordinate` which implements the `Copy` trait
[INFO] [stdout]    --> src/bin/09.rs:104:37
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 let relative_head = knots[i - 1].clone();
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `knots[i - 1]`
[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: you should consider adding a `Default` implementation for `Monkey`
[INFO] [stdout]   --> src/bin/11.rs:71:5
[INFO] [stdout]    |
[INFO] [stdout] 71 | /     pub fn new() -> Monkey {
[INFO] [stdout] 72 | |         Monkey {
[INFO] [stdout] 73 | |             items: Vec::new(),
[INFO] [stdout] 74 | |             operations: String::new(),
[INFO] [stdout] ...  |
[INFO] [stdout] 80 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stdout]    = note: `#[warn(clippy::new_without_default)]` on by default
[INFO] [stdout] help: try adding this
[INFO] [stdout]    |
[INFO] [stdout] 70 + impl Default for Monkey {
[INFO] [stdout] 71 +     fn default() -> Self {
[INFO] [stdout] 72 +         Self::new()
[INFO] [stdout] 73 +     }
[INFO] [stdout] 74 + }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/bin/11.rs:89:11
[INFO] [stdout]    |
[INFO] [stdout] 89 |     while !line.is_none() {
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ help: try: `line.is_some()`
[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] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]    --> src/bin/11.rs:106:20
[INFO] [stdout]     |
[INFO] [stdout] 106 |                 if l == "" {
[INFO] [stdout]     |                    ^^^^^^^ help: using `is_empty` is clearer and more explicit: `l.is_empty()`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]     = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: useless use of `vec!`
[INFO] [stdout]   --> src/bin/09.rs:98:21
[INFO] [stdout]    |
[INFO] [stdout] 98 |     let mut knots = vec![Coordinate::new(); 10];
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use an array directly: `[Coordinate::new(); 10]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stdout]    = note: `#[warn(clippy::useless_vec)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/bin/09.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 102 |             &knots[0].advance(&m.0);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[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] 102 |             let _ = &knots[0].advance(&m.0);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]    --> src/bin/12.rs:262:17
[INFO] [stdout]     |
[INFO] [stdout] 262 | pub fn part_two(input: &str) -> Option<u32> {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `char` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/12.rs:64:29
[INFO] [stdout]    |
[INFO] [stdout] 64 |                 let label = array_copy.get(i, j).unwrap().clone();
[INFO] [stdout]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*array_copy.get(i, j).unwrap()`
[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: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stdout]   --> src/bin/12.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 | /                 if !hashmap.contains_key(&label) {
[INFO] [stdout] 67 | |                     hashmap.insert(label, vec![blob]);
[INFO] [stdout] 68 | |                 } else {
[INFO] [stdout] 69 | |                     hashmap.get_mut(&label).unwrap().push(blob);
[INFO] [stdout] 70 | |                 }
[INFO] [stdout]    | |_________________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stdout]    = note: `#[warn(clippy::map_entry)]` on by default
[INFO] [stdout] help: try
[INFO] [stdout]    |
[INFO] [stdout] 66 ~                 if let std::collections::hash_map::Entry::Vacant(e) = hashmap.entry(label) {
[INFO] [stdout] 67 +                     e.insert(vec![blob]);
[INFO] [stdout] 68 +                 } else {
[INFO] [stdout] 69 +                     hashmap.get_mut(&label).unwrap().push(blob);
[INFO] [stdout] 70 +                 }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/12.rs:94:5
[INFO] [stdout]    |
[INFO] [stdout] 94 |     return blob;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 94 -     return blob;
[INFO] [stdout] 94 +     blob
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `clone` on type `char` which implements the `Copy` trait
[INFO] [stdout]   --> src/bin/12.rs:82:17
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let label = array.get(coord.0, coord.1).unwrap().clone();
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try dereferencing it: `*array.get(coord.0, coord.1).unwrap()`
[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: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/bin/12.rs:88:39
[INFO] [stdout]    |
[INFO] [stdout] 88 |         let neighbors = get_neighbors(&array, point, &label);
[INFO] [stdout]    |                                       ^^^^^^ help: change this to: `array`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `uplevel_blobs`
[INFO] [stdout]    --> src/bin/12.rs:106:14
[INFO] [stdout]     |
[INFO] [stdout] 106 |     for i in 0..uplevel_blobs.len() {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]     = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 106 -     for i in 0..uplevel_blobs.len() {
[INFO] [stdout] 106 +     for (i, <item>) in uplevel_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 107 | /         match find_connection(&current_blob, &uplevel_blobs[i]) {
[INFO] [stdout] 108 | |             Some(_x) => neighbors.push((next_level, i)),
[INFO] [stdout] 109 | |             None => (),
[INFO] [stdout] 110 | |         }
[INFO] [stdout]     | |_________^ help: try: `if let Some(_x) = find_connection(&current_blob, &uplevel_blobs[i]) { neighbors.push((next_level, i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout]     = note: `#[warn(clippy::single_match)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:107:31
[INFO] [stdout]     |
[INFO] [stdout] 107 |         match find_connection(&current_blob, &uplevel_blobs[i]) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `downlevel_blobs`
[INFO] [stdout]    --> src/bin/12.rs:112:14
[INFO] [stdout]     |
[INFO] [stdout] 112 |     for i in 0..downlevel_blobs.len() {
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 112 -     for i in 0..downlevel_blobs.len() {
[INFO] [stdout] 112 +     for (i, <item>) in downlevel_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:113:9
[INFO] [stdout]     |
[INFO] [stdout] 113 | /         match find_connection(&current_blob, &downlevel_blobs[i]) {
[INFO] [stdout] 114 | |             Some(_x) => neighbors.push((previous_level, i)),
[INFO] [stdout] 115 | |             None => (),
[INFO] [stdout] 116 | |         }
[INFO] [stdout]     | |_________^ help: try: `if let Some(_x) = find_connection(&current_blob, &downlevel_blobs[i]) { neighbors.push((previous_level, i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:113:31
[INFO] [stdout]     |
[INFO] [stdout] 113 |         match find_connection(&current_blob, &downlevel_blobs[i]) {
[INFO] [stdout]     |                               ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is used to index `l2_blobs`
[INFO] [stdout]    --> src/bin/12.rs:121:18
[INFO] [stdout]     |
[INFO] [stdout] 121 |         for i in 0..l2_blobs.len() {
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator and enumerate()
[INFO] [stdout]     |
[INFO] [stdout] 121 -         for i in 0..l2_blobs.len() {
[INFO] [stdout] 121 +         for (i, <item>) in l2_blobs.iter().enumerate() {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you seem to be trying to use `match` for destructuring a single pattern. Consider using `if let`
[INFO] [stdout]    --> src/bin/12.rs:122:13
[INFO] [stdout]     |
[INFO] [stdout] 122 | /             match find_connection(&current_blob, &l2_blobs[i]) {
[INFO] [stdout] 123 | |                 Some(_x) => neighbors.push((prev_level(previous_level), i)),
[INFO] [stdout] 124 | |                 None => (),
[INFO] [stdout] 125 | |             }
[INFO] [stdout]     | |_____________^ help: try: `if let Some(_x) = find_connection(&current_blob, &l2_blobs[i]) { neighbors.push((prev_level(previous_level), i)) }`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `row` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 |     for row in 0..rows {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout]    = note: `#[warn(clippy::needless_range_loop)]` on by default
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 11 -     for row in 0..rows {
[INFO] [stdout] 11 +     for <item> in visible.iter_mut().take(rows) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]    --> src/bin/12.rs:122:35
[INFO] [stdout]     |
[INFO] [stdout] 122 |             match find_connection(&current_blob, &l2_blobs[i]) {
[INFO] [stdout]     |                                   ^^^^^^^^^^^^^ help: change this to: `current_blob`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for i in 0..cols {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 19 -     for i in 0..cols {
[INFO] [stdout] 19 +     for <item> in visible.iter_mut().take(cols) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]   --> src/bin/08.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |             for i in 0..row {
[INFO] [stdout]    |                      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 27 -             for i in 0..row {
[INFO] [stdout] 27 +             for <item> in grid.iter().take(row) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:140:5
[INFO] [stdout]     |
[INFO] [stdout] 140 | /     if point.0 + 1 < rows {
[INFO] [stdout] 141 | |         if array.get(point.0 + 1, point.1).unwrap() == label {
[INFO] [stdout] 142 | |             neighbors.push((point.0 + 1, point.1));
[INFO] [stdout] 143 | |         }
[INFO] [stdout] 144 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout]     = note: `#[warn(clippy::collapsible_if)]` on by default
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 140 ~     if point.0 + 1 < rows
[INFO] [stdout] 141 ~         && array.get(point.0 + 1, point.1).unwrap() == label {
[INFO] [stdout] 142 |             neighbors.push((point.0 + 1, point.1));
[INFO] [stdout] 143 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:146:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | /     if point.0 as i32 - 1 > 0 {
[INFO] [stdout] 147 | |         if array.get(point.0 - 1, point.1).unwrap() == label {
[INFO] [stdout] 148 | |             neighbors.push((point.0 - 1, point.1));
[INFO] [stdout] 149 | |         }
[INFO] [stdout] 150 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 146 ~     if point.0 as i32 - 1 > 0
[INFO] [stdout] 147 ~         && array.get(point.0 - 1, point.1).unwrap() == label {
[INFO] [stdout] 148 |             neighbors.push((point.0 - 1, point.1));
[INFO] [stdout] 149 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:152:5
[INFO] [stdout]     |
[INFO] [stdout] 152 | /     if point.1 + 1 < cols {
[INFO] [stdout] 153 | |         if array.get(point.0, point.1 + 1).unwrap() == label {
[INFO] [stdout] 154 | |             neighbors.push((point.0, point.1 + 1));
[INFO] [stdout] 155 | |         }
[INFO] [stdout] 156 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 152 ~     if point.1 + 1 < cols
[INFO] [stdout] 153 ~         && array.get(point.0, point.1 + 1).unwrap() == label {
[INFO] [stdout] 154 |             neighbors.push((point.0, point.1 + 1));
[INFO] [stdout] 155 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this `if` statement can be collapsed
[INFO] [stdout]    --> src/bin/12.rs:158:5
[INFO] [stdout]     |
[INFO] [stdout] 158 | /     if (point.1 as i32) - 1 > 0 {
[INFO] [stdout] 159 | |         if array.get(point.0, point.1 - 1).unwrap() == label {
[INFO] [stdout] 160 | |             neighbors.push((point.0, point.1 - 1));
[INFO] [stdout] 161 | |         }
[INFO] [stdout] 162 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stdout] help: collapse nested if block
[INFO] [stdout]     |
[INFO] [stdout] 158 ~     if (point.1 as i32) - 1 > 0
[INFO] [stdout] 159 ~         && array.get(point.0, point.1 - 1).unwrap() == label {
[INFO] [stdout] 160 |             neighbors.push((point.0, point.1 - 1));
[INFO] [stdout] 161 ~         }
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]   --> src/bin/08.rs:37:22
[INFO] [stdout]    |
[INFO] [stdout] 37 |             for i in (row + 1)..rows {
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 37 -             for i in (row + 1)..rows {
[INFO] [stdout] 37 +             for <item> in grid.iter().take(rows).skip((row + 1)) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i32` is unnecessary
[INFO] [stdout]    --> src/bin/12.rs:171:32
[INFO] [stdout]     |
[INFO] [stdout] 171 |     if current.0 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |                                ^^^^^^^^ help: try: `0_i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout]     = note: `#[warn(clippy::unnecessary_cast)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: casting integer literal to `i32` is unnecessary
[INFO] [stdout]    --> src/bin/12.rs:177:32
[INFO] [stdout]     |
[INFO] [stdout] 177 |     if current.1 as i32 - 1 >= 0 as i32 {
[INFO] [stdout]     |                                ^^^^^^^^ help: try: `0_i32`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_cast
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `row` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:83:16
[INFO] [stdout]    |
[INFO] [stdout] 83 |     for row in 0..rows {
[INFO] [stdout]    |                ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 83 -     for row in 0..rows {
[INFO] [stdout] 83 +     for <item> in visible.iter_mut().take(rows) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]    --> src/bin/12.rs:230:5
[INFO] [stdout]     |
[INFO] [stdout] 230 |     return (x.abs() + y.abs()) as u32;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]     |
[INFO] [stdout] 230 -     return (x.abs() + y.abs()) as u32;
[INFO] [stdout] 230 +     (x.abs() + y.abs()) as u32
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `visible`
[INFO] [stdout]   --> src/bin/08.rs:91:14
[INFO] [stdout]    |
[INFO] [stdout] 91 |     for i in 0..cols {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]    |
[INFO] [stdout] 91 -     for i in 0..cols {
[INFO] [stdout] 91 +     for <item> in visible.iter_mut().take(cols) {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]    --> src/bin/08.rs:100:22
[INFO] [stdout]     |
[INFO] [stdout] 100 |             for i in 0..row {
[INFO] [stdout]     |                      ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 100 -             for i in 0..row {
[INFO] [stdout] 100 +             for <item> in grid.iter().take(row) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: returning the result of a `let` binding from a block
[INFO] [stdout]    --> src/bin/12.rs:273:5
[INFO] [stdout]     |
[INFO] [stdout] 272 |     let array = Array2D::from_rows(&rows);
[INFO] [stdout]     |     -------------------------------------- unnecessary `let` binding
[INFO] [stdout] 273 |     array
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stdout]     = note: `#[warn(clippy::let_and_return)]` on by default
[INFO] [stdout] help: return the expression directly
[INFO] [stdout]     |
[INFO] [stdout] 272 ~     
[INFO] [stdout] 273 ~     Array2D::from_rows(&rows)
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the loop variable `i` is only used to index `grid`
[INFO] [stdout]    --> src/bin/08.rs:114:22
[INFO] [stdout]     |
[INFO] [stdout] 114 |             for i in (row + 1)..rows {
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stdout] help: consider using an iterator
[INFO] [stdout]     |
[INFO] [stdout] 114 -             for i in (row + 1)..rows {
[INFO] [stdout] 114 +             for <item> in grid.iter().take(rows).skip((row + 1)) {
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `print!()` with a format string that ends in a single newline
[INFO] [stdout]   --> src/bin/10.rs:29:13
[INFO] [stdout]    |
[INFO] [stdout] 29 |             print!("Clock tick{}: {}\n", clock, clock * x);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#print_with_newline
[INFO] [stdout]    = note: `#[warn(clippy::print_with_newline)]` on by default
[INFO] [stdout] help: use `println!` instead
[INFO] [stdout]    |
[INFO] [stdout] 29 -             print!("Clock tick{}: {}\n", clock, clock * x);
[INFO] [stdout] 29 +             println!("Clock tick{}: {}", clock, clock * x);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/10.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |         return self.line == other.line;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 43 -         return self.line == other.line;
[INFO] [stdout] 43 +         self.line == other.line
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/10.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         return matching == 0;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -         return matching == 0;
[INFO] [stdout] 59 +         matching == 0
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: usage of `Iterator::fold` on a type that implements `Try`
[INFO] [stdout]   --> src/bin/10.rs:69:23
[INFO] [stdout]    |
[INFO] [stdout] 69 |           self.0.iter().fold(Ok(()), |result, line| {
[INFO] [stdout]    |  _______________________^
[INFO] [stdout] 70 | |             result.and_then(|_| writeln!(f, "{}", line))
[INFO] [stdout] 71 | |         })
[INFO] [stdout]    | |__________^ help: use `try_fold` instead: `try_fold((), |result, line| ...)`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_try_fold
[INFO] [stdout]    = note: `#[warn(clippy::manual_try_fold)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used a field initializer for a tuple struct
[INFO] [stdout]   --> src/bin/10.rs:82:28
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let mut lines: Lines = Lines { 0: Vec::new() };
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^ help: use tuple initialization: `Lines(Vec::new())`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#init_numbered_fields
[INFO] [stdout]    = note: `#[warn(clippy::init_numbered_fields)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: used a field initializer for a tuple struct
[INFO] [stdout]    --> src/bin/10.rs:177:32
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let mut lines: Lines = Lines { 0: Vec::new() };
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^ help: use tuple initialization: `Lines(Vec::new())`
[INFO] [stdout]     |
[INFO] [stdout]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#init_numbered_fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `Eq::assert_receiver_is_total_eq` should never be implemented by hand
[INFO] [stdout]   --> src/bin/10.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     fn assert_receiver_is_total_eq(&self) {}
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this method was used to add checks to the `Eq` derive macro
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #152336 <https://github.com/rust-lang/rust/issues/152336>
[INFO] [stdout]    = note: `#[warn(internal_eq_trait_method_impls)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 18 -     return Some(accum);
[INFO] [stdout] 18 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/bin/03.rs:12:12
[INFO] [stdout]    |
[INFO] [stdout] 12 |         if intersect.len() > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!intersect.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: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/bin/03.rs:14:37
[INFO] [stdout]    |
[INFO] [stdout] 14 |                 accum += item_value(&item);
[INFO] [stdout]    |                                     ^^^^^ help: change this to: `item`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |         return val - 96;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 24 ~         val - 96
[INFO] [stdout] 25 |     } else {
[INFO] [stdout] 26 |         return val - 38;
[INFO] [stdout] 27 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |         return val - 38;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 26 ~         val - 38
[INFO] [stdout] 27 ~     }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     return Some(accum);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 46 -     return Some(accum);
[INFO] [stdout] 46 +     Some(accum)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: accessing first element with `packs.get(0)`
[INFO] [stdout]   --> src/bin/03.rs:35:56
[INFO] [stdout]    |
[INFO] [stdout] 35 |         let packs0: HashSet<char> = HashSet::from_iter(packs.get(0)?.chars());
[INFO] [stdout]    |                                                        ^^^^^^^^^^^^ help: try: `packs.first()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
[INFO] [stdout]    = note: `#[warn(clippy::get_first)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]   --> src/bin/03.rs:38:41
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let mut common: HashSet<char> = packs0.intersection(&packs1).map(|x| *x).collect();
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `packs0.intersection(&packs1).copied()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout]    = note: `#[warn(clippy::map_clone)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: you are using an explicit closure for copying elements
[INFO] [stdout]   --> src/bin/03.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 |         common = common.intersection(&packs2).map(|x| *x).collect();
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider calling the dedicated `copied` method: `common.intersection(&packs2).copied()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_clone
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: length comparison to zero
[INFO] [stdout]   --> src/bin/03.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 40 |         if common.len() > 0 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^ help: using `!is_empty` is clearer and more explicit: `!common.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] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/bin/03.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 54 |     return Some(vecs);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 54 -     return Some(vecs);
[INFO] [stdout] 54 +     Some(vecs)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/bin/03.rs:71:29
[INFO] [stdout]    |
[INFO] [stdout] 71 |         assert_eq!(part_one(&str_input), Some(157));
[INFO] [stdout]    |                             ^^^^^^^^^^ help: change this to: `str_input`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.99s
[INFO] running `Command { std: "docker" "inspect" "53f6fb4ea2bc18b351251167ddfc44268d2a9e14923d908e7f9b2846296a780f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53f6fb4ea2bc18b351251167ddfc44268d2a9e14923d908e7f9b2846296a780f", kill_on_drop: false }`
[INFO] [stdout] 53f6fb4ea2bc18b351251167ddfc44268d2a9e14923d908e7f9b2846296a780f