[INFO] updating cached repository Darkdoughnut/advent_of_code_2018
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Darkdoughnut/advent_of_code_2018
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Darkdoughnut/advent_of_code_2018" "work/ex/clippy-test-run/sources/stable/gh/Darkdoughnut/advent_of_code_2018"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/Darkdoughnut/advent_of_code_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Darkdoughnut/advent_of_code_2018" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Darkdoughnut/advent_of_code_2018"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Darkdoughnut/advent_of_code_2018'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b061a4648f32741fd107e118c851fd578e09ca0f
[INFO] sha for GitHub repo Darkdoughnut/advent_of_code_2018: b061a4648f32741fd107e118c851fd578e09ca0f
[INFO] validating manifest of Darkdoughnut/advent_of_code_2018 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Darkdoughnut/advent_of_code_2018 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Darkdoughnut/advent_of_code_2018
[INFO] finished frobbing Darkdoughnut/advent_of_code_2018
[INFO] frobbed toml for Darkdoughnut/advent_of_code_2018 written to work/ex/clippy-test-run/sources/stable/gh/Darkdoughnut/advent_of_code_2018/Cargo.toml
[INFO] started frobbing Darkdoughnut/advent_of_code_2018
[INFO] finished frobbing Darkdoughnut/advent_of_code_2018
[INFO] frobbed toml for Darkdoughnut/advent_of_code_2018 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/Darkdoughnut/advent_of_code_2018/Cargo.toml
[INFO] crate Darkdoughnut/advent_of_code_2018 has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting Darkdoughnut/advent_of_code_2018 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/Darkdoughnut/advent_of_code_2018:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 70deeb5eb990942c468ebb39c143d0e1f72be4fb8dc70e352970e9b797c34242
[INFO] running `"docker" "start" "-a" "70deeb5eb990942c468ebb39c143d0e1f72be4fb8dc70e352970e9b797c34242"`
[INFO] [stderr]     Checking day-01 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |         year: year,
[INFO] [stderr]    |         ^^^^^^^^^^ help: replace it with: `year`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         month: month,
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `month`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         day: day,
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `day`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         hour: hour,
[INFO] [stderr]    |         ^^^^^^^^^^ help: replace it with: `hour`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |         minute: minute,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: replace it with: `minute`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |             return true;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             return false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         return false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day6.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     return x + y;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `x + y`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/bin/day3.rs:96:5
[INFO] [stderr]     |
[INFO] [stderr] 96  | /     return Position {
[INFO] [stderr] 97  | |         left_margin,
[INFO] [stderr] 98  | |         top_margin,
[INFO] [stderr] 99  | |         width,
[INFO] [stderr] 100 | |         height,
[INFO] [stderr] 101 | |         id,
[INFO] [stderr] 102 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 96  |     Position {
[INFO] [stderr] 97  |         left_margin,
[INFO] [stderr] 98  |         top_margin,
[INFO] [stderr] 99  |         width,
[INFO] [stderr] 100 |         height,
[INFO] [stderr] 101 |         id,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |             return true;
[INFO] [stderr]    |             ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:18:13
[INFO] [stderr]    |
[INFO] [stderr] 18 |             return false;
[INFO] [stderr]    |             ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day5.rs:21:9
[INFO] [stderr]    |
[INFO] [stderr] 21 |         return false;
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: remove `return` as shown: `false`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: this if-then-else expression returns a bool literal
[INFO] [stderr]   --> src/bin/day5.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 | /         if a.to_lowercase().to_string() == b.to_lowercase().to_string() {
[INFO] [stderr] 16 | |             return true;
[INFO] [stderr] 17 | |         } else {
[INFO] [stderr] 18 | |             return false;
[INFO] [stderr] 19 | |         }
[INFO] [stderr]    | |_________^ help: you can reduce it to: `return a.to_lowercase().to_string() == b.to_lowercase().to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/bin/day5.rs:35:23
[INFO] [stderr]    |
[INFO] [stderr] 35 |             let end = reaction_vector.last().clone();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `reaction_vector.last()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/bin/day5.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 | /             match end {
[INFO] [stderr] 37 | |                 Some(x) => {
[INFO] [stderr] 38 | |                     react = is_reaction_pair(*x, c);
[INFO] [stderr] 39 | |                 }
[INFO] [stderr] 40 | |                 None => {}
[INFO] [stderr] 41 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 36 |             if let Some(x) = end {
[INFO] [stderr] 37 |     react = is_reaction_pair(*x, c);
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/bin/day5.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 | /                 match last_elem {
[INFO] [stderr] 62 | |                     Some(x) => {
[INFO] [stderr] 63 | |                         react = is_reaction_pair(*x, c);
[INFO] [stderr] 64 | |                     }
[INFO] [stderr] 65 | |                     None => {}
[INFO] [stderr] 66 | |                 }
[INFO] [stderr]    | |_________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 if let Some(x) = last_elem {
[INFO] [stderr] 62 |     react = is_reaction_pair(*x, c);
[INFO] [stderr] 63 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: this if-then-else expression returns a bool literal
[INFO] [stderr]   --> src/bin/day5.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 | /         if a.to_lowercase().to_string() == b.to_lowercase().to_string() {
[INFO] [stderr] 16 | |             return true;
[INFO] [stderr] 17 | |         } else {
[INFO] [stderr] 18 | |             return false;
[INFO] [stderr] 19 | |         }
[INFO] [stderr]    | |_________^ help: you can reduce it to: `return a.to_lowercase().to_string() == b.to_lowercase().to_string()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_bool)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]   --> src/bin/day5.rs:35:23
[INFO] [stderr]    |
[INFO] [stderr] 35 |             let end = reaction_vector.last().clone();
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing the `clone` call: `reaction_vector.last()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/bin/day5.rs:36:13
[INFO] [stderr]    |
[INFO] [stderr] 36 | /             match end {
[INFO] [stderr] 37 | |                 Some(x) => {
[INFO] [stderr] 38 | |                     react = is_reaction_pair(*x, c);
[INFO] [stderr] 39 | |                 }
[INFO] [stderr] 40 | |                 None => {}
[INFO] [stderr] 41 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 36 |             if let Some(x) = end {
[INFO] [stderr] 37 |     react = is_reaction_pair(*x, c);
[INFO] [stderr] 38 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/bin/day5.rs:61:17
[INFO] [stderr]    |
[INFO] [stderr] 61 | /                 match last_elem {
[INFO] [stderr] 62 | |                     Some(x) => {
[INFO] [stderr] 63 | |                         react = is_reaction_pair(*x, c);
[INFO] [stderr] 64 | |                     }
[INFO] [stderr] 65 | |                     None => {}
[INFO] [stderr] 66 | |                 }
[INFO] [stderr]    | |_________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 61 |                 if let Some(x) = last_elem {
[INFO] [stderr] 62 |     react = is_reaction_pair(*x, c);
[INFO] [stderr] 63 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 43
[INFO] [stderr]    --> src/bin/day6.rs:32:1
[INFO] [stderr]     |
[INFO] [stderr] 32  | / fn main() {
[INFO] [stderr] 33  | |     println!("----- Part 1 -----");
[INFO] [stderr] 34  | |     let file = File::open("input/day6").expect("Unable to open file.");
[INFO] [stderr] 35  | |     let reader = BufReader::new(file);
[INFO] [stderr] ...   |
[INFO] [stderr] 229 | |     println!("Region size: {}", region_size);
[INFO] [stderr] 230 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `point_idx` is used as a loop counter. Consider using `for (point_idx, item) in &points.enumerate()` or similar iterators
[INFO] [stderr]   --> src/bin/day6.rs:58:18
[INFO] [stderr]    |
[INFO] [stderr] 58 |     for point in &points {
[INFO] [stderr]    |                  ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/bin/day6.rs:66:22
[INFO] [stderr]    |
[INFO] [stderr] 66 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/bin/day6.rs:87:22
[INFO] [stderr]    |
[INFO] [stderr] 87 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/bin/day6.rs:108:22
[INFO] [stderr]     |
[INFO] [stderr] 108 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/bin/day6.rs:129:22
[INFO] [stderr]     |
[INFO] [stderr] 129 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to want to iterate on a map's values
[INFO] [stderr]    --> src/bin/day6.rs:204:24
[INFO] [stderr]     |
[INFO] [stderr] 204 |     for (_id, area) in &total_area_by_id {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::for_kv_map)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_kv_map
[INFO] [stderr] help: use the corresponding method
[INFO] [stderr]     |
[INFO] [stderr] 204 |     for area in total_area_by_id.values() {
[INFO] [stderr]     |         ^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]    --> src/bin/day6.rs:206:12
[INFO] [stderr]     |
[INFO] [stderr] 206 |         if area > &best_area {
[INFO] [stderr]     |            ^^^^^^^----------
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   help: use the right value directly: `best_area`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day6.rs:29:5
[INFO] [stderr]    |
[INFO] [stderr] 29 |     return x + y;
[INFO] [stderr]    |     ^^^^^^^^^^^^^ help: remove `return` as shown: `x + y`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |         year: year,
[INFO] [stderr]    |         ^^^^^^^^^^ help: replace it with: `year`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_field_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         month: month,
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: replace it with: `month`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         day: day,
[INFO] [stderr]    |         ^^^^^^^^ help: replace it with: `day`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:47:9
[INFO] [stderr]    |
[INFO] [stderr] 47 |         hour: hour,
[INFO] [stderr]    |         ^^^^^^^^^^ help: replace it with: `hour`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/bin/day4.rs:48:9
[INFO] [stderr]    |
[INFO] [stderr] 48 |         minute: minute,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: replace it with: `minute`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stderr] 
[INFO] [stderr] warning: the function has a cyclomatic complexity of 43
[INFO] [stderr]    --> src/bin/day6.rs:32:1
[INFO] [stderr]     |
[INFO] [stderr] 32  | / fn main() {
[INFO] [stderr] 33  | |     println!("----- Part 1 -----");
[INFO] [stderr] 34  | |     let file = File::open("input/day6").expect("Unable to open file.");
[INFO] [stderr] 35  | |     let reader = BufReader::new(file);
[INFO] [stderr] ...   |
[INFO] [stderr] 229 | |     println!("Region size: {}", region_size);
[INFO] [stderr] 230 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::cyclomatic_complexity)] on by default
[INFO] [stderr]     = help: you could split it up into multiple smaller functions
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cyclomatic_complexity
[INFO] [stderr] 
[INFO] [stderr] warning: the variable `point_idx` is used as a loop counter. Consider using `for (point_idx, item) in &points.enumerate()` or similar iterators
[INFO] [stderr]   --> src/bin/day6.rs:58:18
[INFO] [stderr]    |
[INFO] [stderr] 58 |     for point in &points {
[INFO] [stderr]    |                  ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::explicit_counter_loop)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#explicit_counter_loop
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/bin/day6.rs:66:22
[INFO] [stderr]    |
[INFO] [stderr] 66 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::range_plus_one)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]   --> src/bin/day6.rs:87:22
[INFO] [stderr]    |
[INFO] [stderr] 87 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/bin/day6.rs:108:22
[INFO] [stderr]     |
[INFO] [stderr] 108 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/bin/day6.rs:129:22
[INFO] [stderr]     |
[INFO] [stderr] 129 |             for i in 0..manhattan_dist + 1 {
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^ help: use: `0..=manhattan_dist`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to want to iterate on a map's values
[INFO] [stderr]    --> src/bin/day6.rs:204:24
[INFO] [stderr]     |
[INFO] [stderr] 204 |     for (_id, area) in &total_area_by_id {
[INFO] [stderr]     |                        ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::for_kv_map)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#for_kv_map
[INFO] [stderr] help: use the corresponding method
[INFO] [stderr]     |
[INFO] [stderr] 204 |     for area in total_area_by_id.values() {
[INFO] [stderr]     |         ^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: taken reference of right operand
[INFO] [stderr]    --> src/bin/day6.rs:206:12
[INFO] [stderr]     |
[INFO] [stderr] 206 |         if area > &best_area {
[INFO] [stderr]     |            ^^^^^^^----------
[INFO] [stderr]     |                   |
[INFO] [stderr]     |                   help: use the right value directly: `best_area`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::op_ref)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#op_ref
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/bin/day3.rs:96:5
[INFO] [stderr]     |
[INFO] [stderr] 96  | /     return Position {
[INFO] [stderr] 97  | |         left_margin,
[INFO] [stderr] 98  | |         top_margin,
[INFO] [stderr] 99  | |         width,
[INFO] [stderr] 100 | |         height,
[INFO] [stderr] 101 | |         id,
[INFO] [stderr] 102 | |     };
[INFO] [stderr]     | |______^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]     |
[INFO] [stderr] 96  |     Position {
[INFO] [stderr] 97  |         left_margin,
[INFO] [stderr] 98  |         top_margin,
[INFO] [stderr] 99  |         width,
[INFO] [stderr] 100 |         height,
[INFO] [stderr] 101 |         id,
[INFO] [stderr]   ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day2.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     return 0;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/bin/day2.rs:45:46
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn find_similar_words<B: BufRead>(reader: B) -> () {
[INFO] [stderr]    |                                              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day4.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 | /     return Date {
[INFO] [stderr] 44 | |         year: year,
[INFO] [stderr] 45 | |         month: month,
[INFO] [stderr] 46 | |         day: day,
[INFO] [stderr] 47 | |         hour: hour,
[INFO] [stderr] 48 | |         minute: minute,
[INFO] [stderr] 49 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 43 |     Date {
[INFO] [stderr] 44 |         year: year,
[INFO] [stderr] 45 |         month: month,
[INFO] [stderr] 46 |         day: day,
[INFO] [stderr] 47 |         hour: hour,
[INFO] [stderr] 48 |         minute: minute,
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day4.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     return guard_id_str.parse::<u32>().unwrap();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard_id_str.parse::<u32>().unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]    --> src/bin/day4.rs:155:26
[INFO] [stderr]     |
[INFO] [stderr] 155 | fn test_string_to_date() -> () {}
[INFO] [stderr]     |                          ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/bin/day2.rs:64:55
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn is_correct_hamming_distance(first: String, second: &String) -> bool {
[INFO] [stderr]    |                                                       ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/bin/day4.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |     assert!(timestamps.len() != 0);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!timestamps.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/bin/day4.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 (curr_date.minute - time_asleep) as u32;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(curr_date.minute - time_asleep)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stderr]    --> src/bin/day4.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 | /             if !guard_info.contains_key(&guard_num) {
[INFO] [stderr] 104 | |                 guard_info.insert(
[INFO] [stderr] 105 | |                     guard_num,
[INFO] [stderr] 106 | |                     Guard {
[INFO] [stderr] ...   |
[INFO] [stderr] 110 | |                 );
[INFO] [stderr] 111 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_entry)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stderr] help: consider using
[INFO] [stderr]     |
[INFO] [stderr] 103 |             guard_info.entry(guard_num).or_insert(Guard {
[INFO] [stderr] 104 |                         total_sleep: 0,
[INFO] [stderr] 105 |                         sleep_count: vec![0u32; 60],
[INFO] [stderr] 106 |                     })
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/bin/day4.rs:124:29
[INFO] [stderr]     |
[INFO] [stderr] 124 |     let best_total_sleep = &guard_info.get(&best_guard_num).unwrap().sleep_count;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&guard_info[&best_guard_num]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `best_total_sleep`
[INFO] [stderr]    --> src/bin/day4.rs:125:14
[INFO] [stderr]     |
[INFO] [stderr] 125 |     for x in 0..59 {
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 125 |     for (x, <item>) in best_total_sleep.iter().enumerate().take(59) {
[INFO] [stderr]     |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `best_total_sleep`
[INFO] [stderr]    --> src/bin/day4.rs:141:18
[INFO] [stderr]     |
[INFO] [stderr] 141 |         for x in 0..59 {
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 141 |         for (x, <item>) in best_total_sleep.iter().enumerate().take(59) {
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day4.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 | /     return Date {
[INFO] [stderr] 44 | |         year: year,
[INFO] [stderr] 45 | |         month: month,
[INFO] [stderr] 46 | |         day: day,
[INFO] [stderr] 47 | |         hour: hour,
[INFO] [stderr] 48 | |         minute: minute,
[INFO] [stderr] 49 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] help: remove `return` as shown
[INFO] [stderr]    |
[INFO] [stderr] 43 |     Date {
[INFO] [stderr] 44 |         year: year,
[INFO] [stderr] 45 |         month: month,
[INFO] [stderr] 46 |         day: day,
[INFO] [stderr] 47 |         hour: hour,
[INFO] [stderr] 48 |         minute: minute,
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day4.rs:55:5
[INFO] [stderr]    |
[INFO] [stderr] 55 |     return guard_id_str.parse::<u32>().unwrap();
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `guard_id_str.parse::<u32>().unwrap()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/bin/day2.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     return 0;
[INFO] [stderr]    |     ^^^^^^^^^ help: remove `return` as shown: `0`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/bin/day2.rs:45:46
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn find_similar_words<B: BufRead>(reader: B) -> () {
[INFO] [stderr]    |                                              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/bin/day2.rs:64:55
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn is_correct_hamming_distance(first: String, second: &String) -> bool {
[INFO] [stderr]    |                                                       ^^^^^^^ help: change this to: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/bin/day4.rs:72:13
[INFO] [stderr]    |
[INFO] [stderr] 72 |     assert!(timestamps.len() != 0);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `!timestamps.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::len_zero)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]   --> src/bin/day4.rs:94:17
[INFO] [stderr]    |
[INFO] [stderr] 94 |                 (curr_date.minute - time_asleep) as u32;
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u32::from(curr_date.minute - time_asleep)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: usage of `contains_key` followed by `insert` on a `HashMap`
[INFO] [stderr]    --> src/bin/day4.rs:103:13
[INFO] [stderr]     |
[INFO] [stderr] 103 | /             if !guard_info.contains_key(&guard_num) {
[INFO] [stderr] 104 | |                 guard_info.insert(
[INFO] [stderr] 105 | |                     guard_num,
[INFO] [stderr] 106 | |                     Guard {
[INFO] [stderr] ...   |
[INFO] [stderr] 110 | |                 );
[INFO] [stderr] 111 | |             }
[INFO] [stderr]     | |_____________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::map_entry)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#map_entry
[INFO] [stderr] help: consider using
[INFO] [stderr]     |
[INFO] [stderr] 103 |             guard_info.entry(guard_num).or_insert(Guard {
[INFO] [stderr] 104 |                         total_sleep: 0,
[INFO] [stderr] 105 |                         sleep_count: vec![0u32; 60],
[INFO] [stderr] 106 |                     })
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise
[INFO] [stderr]    --> src/bin/day4.rs:124:29
[INFO] [stderr]     |
[INFO] [stderr] 124 |     let best_total_sleep = &guard_info.get(&best_guard_num).unwrap().sleep_count;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&guard_info[&best_guard_num]`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::get_unwrap)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `best_total_sleep`
[INFO] [stderr]    --> src/bin/day4.rs:125:14
[INFO] [stderr]     |
[INFO] [stderr] 125 |     for x in 0..59 {
[INFO] [stderr]     |              ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 125 |     for (x, <item>) in best_total_sleep.iter().enumerate().take(59) {
[INFO] [stderr]     |         ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `x` is used to index `best_total_sleep`
[INFO] [stderr]    --> src/bin/day4.rs:141:18
[INFO] [stderr]     |
[INFO] [stderr] 141 |         for x in 0..59 {
[INFO] [stderr]     |                  ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 141 |         for (x, <item>) in best_total_sleep.iter().enumerate().take(59) {
[INFO] [stderr]     |             ^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.77s
[INFO] running `"docker" "inspect" "70deeb5eb990942c468ebb39c143d0e1f72be4fb8dc70e352970e9b797c34242"`
[INFO] running `"docker" "rm" "-f" "70deeb5eb990942c468ebb39c143d0e1f72be4fb8dc70e352970e9b797c34242"`
[INFO] [stdout] 70deeb5eb990942c468ebb39c143d0e1f72be4fb8dc70e352970e9b797c34242