[INFO] updating cached repository xSke/aoc18
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/xSke/aoc18
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/xSke/aoc18" "work/ex/clippy-test-run/sources/stable/gh/xSke/aoc18"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/xSke/aoc18'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/xSke/aoc18" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/xSke/aoc18"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/xSke/aoc18'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a4fb9047ae1464585d7b5ab93da6b1c8e56751d5
[INFO] sha for GitHub repo xSke/aoc18: a4fb9047ae1464585d7b5ab93da6b1c8e56751d5
[INFO] validating manifest of xSke/aoc18 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 xSke/aoc18 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 xSke/aoc18
[INFO] finished frobbing xSke/aoc18
[INFO] frobbed toml for xSke/aoc18 written to work/ex/clippy-test-run/sources/stable/gh/xSke/aoc18/Cargo.toml
[INFO] started frobbing xSke/aoc18
[INFO] finished frobbing xSke/aoc18
[INFO] frobbed toml for xSke/aoc18 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/xSke/aoc18/Cargo.toml
[INFO] crate xSke/aoc18 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 xSke/aoc18 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/xSke/aoc18:/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] f61a27ffadf8b4786d5d05d1984493a20b188cc9119609fd7589dfbaf92faf1d
[INFO] running `"docker" "start" "-a" "f61a27ffadf8b4786d5d05d1984493a20b188cc9119609fd7589dfbaf92faf1d"`
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]    Compiling encoding_rs v0.8.13
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking clicolors-control v0.3.0
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking arrayvec v0.4.8
[INFO] [stderr]     Checking parking_lot_core v0.3.1
[INFO] [stderr]     Checking crossbeam-epoch v0.6.1
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking parking_lot v0.7.0
[INFO] [stderr]     Checking crossbeam-deque v0.6.2
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking tokio-threadpool v0.1.9
[INFO] [stderr]     Checking console v0.7.0
[INFO] [stderr]     Checking tokio-uds v0.2.4
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking indicatif v0.10.1
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking tokio v0.1.13
[INFO] [stderr]     Checking hyper v0.12.16
[INFO] [stderr]     Checking hyper-tls v0.3.1
[INFO] [stderr]     Checking reqwest v0.9.5
[INFO] [stderr]     Checking aoc18 v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let a = if x > 0 && y > 0 { self.grid[y-1][x-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let b = if y > 0 { self.grid[y-1][x+w-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let c = if x > 0 { self.grid[y+h-1][x-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let d = self.grid[y+h-1][x+w-1];
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let a = if x > 0 && y > 0 { self.grid[y-1][x-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:24:13
[INFO] [stderr]    |
[INFO] [stderr] 24 |         let b = if y > 0 { self.grid[y-1][x+w-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:25:13
[INFO] [stderr]    |
[INFO] [stderr] 25 |         let c = if x > 0 { self.grid[y+h-1][x-1] } else { 0 };
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 8th binding whose name is just one char
[INFO] [stderr]   --> src/day11.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let d = self.grid[y+h-1][x+w-1];
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/day1.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return (input
[INFO] [stderr] 5 | |         .lines()
[INFO] [stderr] 6 | |         .fold(0, |acc, line| acc + line.parse::<isize>().unwrap())
[INFO] [stderr] 7 | |         .to_string(), ());
[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] 4 |     (input
[INFO] [stderr] 5 |         .lines()
[INFO] [stderr] 6 |         .fold(0, |acc, line| acc + line.parse::<isize>().unwrap())
[INFO] [stderr] 7 |         .to_string(), ())
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/day2.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     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/day3.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     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 `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/day4.rs:54:16
[INFO] [stderr]    |
[INFO] [stderr] 54 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 55 | |             if rest == "falls asleep" {
[INFO] [stderr] 56 | |                 guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 57 | |                     .push(SleepSpan(minute, minute));
[INFO] [stderr] ...  |
[INFO] [stderr] 62 | |             }
[INFO] [stderr] 63 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 54 |         } else if rest == "falls asleep" {
[INFO] [stderr] 55 |     guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 56 |         .push(SleepSpan(minute, minute));
[INFO] [stderr] 57 | } else if rest == "wakes up" {
[INFO] [stderr] 58 |     guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 59 |         .iter_mut().last().unwrap()
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/day5.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 12 | |             if are_pairs(stack[stack.len() - 1], c) {
[INFO] [stderr] 13 | |                 stack.pop();
[INFO] [stderr] 14 | |             } else {
[INFO] [stderr] 15 | |                 stack.push(c);
[INFO] [stderr] 16 | |             }
[INFO] [stderr] 17 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 11 |         } else if are_pairs(stack[stack.len() - 1], c) {
[INFO] [stderr] 12 |     stack.pop();
[INFO] [stderr] 13 | } else {
[INFO] [stderr] 14 |     stack.push(c);
[INFO] [stderr] 15 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/day7.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     return (task as usize) - 65 + 60;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(task as usize) - 65 + 60`
[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/day1.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     return (input
[INFO] [stderr] 5 | |         .lines()
[INFO] [stderr] 6 | |         .fold(0, |acc, line| acc + line.parse::<isize>().unwrap())
[INFO] [stderr] 7 | |         .to_string(), ());
[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] 4 |     (input
[INFO] [stderr] 5 |         .lines()
[INFO] [stderr] 6 |         .fold(0, |acc, line| acc + line.parse::<isize>().unwrap())
[INFO] [stderr] 7 |         .to_string(), ())
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]  --> src/day2.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     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/day3.rs:23:5
[INFO] [stderr]    |
[INFO] [stderr] 23 |     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 `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/day4.rs:54:16
[INFO] [stderr]    |
[INFO] [stderr] 54 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 55 | |             if rest == "falls asleep" {
[INFO] [stderr] 56 | |                 guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 57 | |                     .push(SleepSpan(minute, minute));
[INFO] [stderr] ...  |
[INFO] [stderr] 62 | |             }
[INFO] [stderr] 63 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 54 |         } else if rest == "falls asleep" {
[INFO] [stderr] 55 |     guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 56 |         .push(SleepSpan(minute, minute));
[INFO] [stderr] 57 | } else if rest == "wakes up" {
[INFO] [stderr] 58 |     guards.get_mut(&current_guard).unwrap().0
[INFO] [stderr] 59 |         .iter_mut().last().unwrap()
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: this `else { if .. }` block can be collapsed
[INFO] [stderr]   --> src/day5.rs:11:16
[INFO] [stderr]    |
[INFO] [stderr] 11 |           } else {
[INFO] [stderr]    |  ________________^
[INFO] [stderr] 12 | |             if are_pairs(stack[stack.len() - 1], c) {
[INFO] [stderr] 13 | |                 stack.pop();
[INFO] [stderr] 14 | |             } else {
[INFO] [stderr] 15 | |                 stack.push(c);
[INFO] [stderr] 16 | |             }
[INFO] [stderr] 17 | |         }
[INFO] [stderr]    | |_________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 11 |         } else if are_pairs(stack[stack.len() - 1], c) {
[INFO] [stderr] 12 |     stack.pop();
[INFO] [stderr] 13 | } else {
[INFO] [stderr] 14 |     stack.push(c);
[INFO] [stderr] 15 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/day7.rs:69:5
[INFO] [stderr]    |
[INFO] [stderr] 69 |     return (task as usize) - 65 + 60;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(task as usize) - 65 + 60`
[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: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day4.rs:53:41
[INFO] [stderr]    |
[INFO] [stderr] 53 |             guards.entry(current_guard).or_insert(Guard(Vec::new()));
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| Guard(Vec::new()))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `minute` is used to index `minutes`
[INFO] [stderr]   --> src/day4.rs:80:23
[INFO] [stderr]    |
[INFO] [stderr] 80 |         for minute in 0..60 {
[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] 80 |         for (minute, <item>) in minutes.iter_mut().enumerate().take(60) {
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]  --> src/day5.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |         if stack.len() == 0 {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `stack.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: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day7.rs:21:18
[INFO] [stderr]    |
[INFO] [stderr] 21 |                 .or_insert(vec![prerequisite]);
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| vec![prerequisite])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day7.rs:22:47
[INFO] [stderr]    |
[INFO] [stderr] 22 |             prerequisites.entry(prerequisite).or_insert(vec![]);
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| vec![])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day7.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |             .filter(|(_, pqs)| pqs.len() == 0)
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pqs.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day7.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         self.prerequisites.len() == 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.prerequisites.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day8.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     if node.child_nodes.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `node.child_nodes.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/day8.rs:37:16
[INFO] [stderr]    |
[INFO] [stderr] 37 |         .split(" ")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/day10.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         display.get_mut(y as usize).unwrap()[x as usize] = '#';
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `display[y as usize]`
[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: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/main.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         (days.get_mut(day_num - 1).unwrap())(&session);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `days[day_num - 1]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day4.rs:53:41
[INFO] [stderr]    |
[INFO] [stderr] 53 |             guards.entry(current_guard).or_insert(Guard(Vec::new()));
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| Guard(Vec::new()))`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::or_fun_call)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: the loop variable `minute` is used to index `minutes`
[INFO] [stderr]   --> src/day4.rs:80:23
[INFO] [stderr]    |
[INFO] [stderr] 80 |         for minute in 0..60 {
[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] 80 |         for (minute, <item>) in minutes.iter_mut().enumerate().take(60) {
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]  --> src/day5.rs:9:12
[INFO] [stderr]   |
[INFO] [stderr] 9 |         if stack.len() == 0 {
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `stack.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: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day7.rs:21:18
[INFO] [stderr]    |
[INFO] [stderr] 21 |                 .or_insert(vec![prerequisite]);
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| vec![prerequisite])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: use of `or_insert` followed by a function call
[INFO] [stderr]   --> src/day7.rs:22:47
[INFO] [stderr]    |
[INFO] [stderr] 22 |             prerequisites.entry(prerequisite).or_insert(vec![]);
[INFO] [stderr]    |                                               ^^^^^^^^^^^^^^^^^ help: try this: `or_insert_with(|| vec![])`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#or_fun_call
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day7.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |             .filter(|(_, pqs)| pqs.len() == 0)
[INFO] [stderr]    |                                ^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `pqs.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day7.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |         self.prerequisites.len() == 0
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `self.prerequisites.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: length comparison to zero
[INFO] [stderr]   --> src/day8.rs:24:8
[INFO] [stderr]    |
[INFO] [stderr] 24 |     if node.child_nodes.len() == 0 {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `node.child_nodes.is_empty()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_zero
[INFO] [stderr] 
[INFO] [stderr] warning: single-character string constant used as pattern
[INFO] [stderr]   --> src/day8.rs:37:16
[INFO] [stderr]    |
[INFO] [stderr] 37 |         .split(" ")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `' '`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_char_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_char_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/day10.rs:64:9
[INFO] [stderr]    |
[INFO] [stderr] 64 |         display.get_mut(y as usize).unwrap()[x as usize] = '#';
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `display[y as usize]`
[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: called `.get_mut().unwrap()` on a Vec. Using `[]` is more clear and more concise
[INFO] [stderr]   --> src/main.rs:85:9
[INFO] [stderr]    |
[INFO] [stderr] 85 |         (days.get_mut(day_num - 1).unwrap())(&session);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `days[day_num - 1]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_unwrap
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.64s
[INFO] running `"docker" "inspect" "f61a27ffadf8b4786d5d05d1984493a20b188cc9119609fd7589dfbaf92faf1d"`
[INFO] running `"docker" "rm" "-f" "f61a27ffadf8b4786d5d05d1984493a20b188cc9119609fd7589dfbaf92faf1d"`
[INFO] [stdout] f61a27ffadf8b4786d5d05d1984493a20b188cc9119609fd7589dfbaf92faf1d