[INFO] updating cached repository BookOwl/advent2018 [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/BookOwl/advent2018 [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/BookOwl/advent2018" "work/ex/clippy-test-run/sources/stable/gh/BookOwl/advent2018"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/BookOwl/advent2018'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/BookOwl/advent2018" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/BookOwl/advent2018"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/BookOwl/advent2018'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 642ea3caa2d25ee5d9ba9c6ba24b65c5eab3b918 [INFO] sha for GitHub repo BookOwl/advent2018: 642ea3caa2d25ee5d9ba9c6ba24b65c5eab3b918 [INFO] validating manifest of BookOwl/advent2018 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 BookOwl/advent2018 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 BookOwl/advent2018 [INFO] finished frobbing BookOwl/advent2018 [INFO] frobbed toml for BookOwl/advent2018 written to work/ex/clippy-test-run/sources/stable/gh/BookOwl/advent2018/Cargo.toml [INFO] started frobbing BookOwl/advent2018 [INFO] finished frobbing BookOwl/advent2018 [INFO] frobbed toml for BookOwl/advent2018 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/BookOwl/advent2018/Cargo.toml [INFO] crate BookOwl/advent2018 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 BookOwl/advent2018 against stable for clippy-test-run [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/BookOwl/advent2018:/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] 0b738c82600c7131f48f22b9f55c6b6f6753abbf9e6f5091bfe965a718ec4a93 [INFO] running `"docker" "start" "-a" "0b738c82600c7131f48f22b9f55c6b6f6753abbf9e6f5091bfe965a718ec4a93"` [INFO] [stderr] Checking advent2018 v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day1.rs:12:33 [INFO] [stderr] | [INFO] [stderr] 12 | let freq: i32 = input.split("\n").map(|n| n.parse::().unwrap()).sum(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [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: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day1.rs:12:33 [INFO] [stderr] | [INFO] [stderr] 12 | let freq: i32 = input.split("\n").map(|n| n.parse::().unwrap()).sum(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [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: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day1.rs:25:36 [INFO] [stderr] | [INFO] [stderr] 25 | let freq_changes = input.split("\n").map(|n| n.parse::().unwrap()).cycle(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [INFO] [stderr] | [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: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day1.rs:25:36 [INFO] [stderr] | [INFO] [stderr] 25 | let freq_changes = input.split("\n").map(|n| n.parse::().unwrap()).cycle(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [INFO] [stderr] | [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: variable does not need to be mutable [INFO] [stderr] --> src/bin/day2.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let mut words = words?; [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: the loop variable `i` is used to index `grid` [INFO] [stderr] --> src/bin/day6.rs:19:14 [INFO] [stderr] | [INFO] [stderr] 19 | for i in 0..grid.len() { [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] 19 | for (i, ) in grid.iter_mut().enumerate() { [INFO] [stderr] | ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the loop variable `i` is only used to index `grid`. [INFO] [stderr] --> src/bin/day6.rs:68:14 [INFO] [stderr] | [INFO] [stderr] 68 | for i in 0..grid.len() { [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] 68 | for in &mut grid { [INFO] [stderr] | ^^^^^^ ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/day2.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let mut words = words?; [INFO] [stderr] | ----^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: the loop variable `x` is only used to index `fabric`. [INFO] [stderr] --> src/bin/day3.rs:32:18 [INFO] [stderr] | [INFO] [stderr] 32 | for x in self.left..(self.left+self.width) { [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] 32 | for in fabric.iter_mut().skip(self.left).take(self.width) { [INFO] [stderr] | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day3.rs:63:39 [INFO] [stderr] | [INFO] [stderr] 63 | let claims: Vec<_> = CLAIMS.split("\n").map(|c| Claim::from_str(c, &re)).collect(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [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: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day3.rs:76:39 [INFO] [stderr] | [INFO] [stderr] 76 | let claims: Vec<_> = CLAIMS.split("\n").map(|c| Claim::from_str(c, &re)).collect(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [INFO] [stderr] | [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: variable does not need to be mutable [INFO] [stderr] --> src/bin/day4.rs:63:21 [INFO] [stderr] | [INFO] [stderr] 63 | let mut map = sleep_times.entry(gaurd_id).or_insert_with(HashMap::new); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/day4.rs:105:17 [INFO] [stderr] | [INFO] [stderr] 105 | let mut x = minutes.entry(i).or_insert((0, 0)); // (gaurd_id, number_of_times_asleep) [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:49:33 [INFO] [stderr] | [INFO] [stderr] 49 | fn get_sleep_times<'a>(entries: &Vec>) -> HashMap> { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:91:23 [INFO] [stderr] | [INFO] [stderr] 91 | fn part1<'a>(entries: &Vec>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise [INFO] [stderr] --> src/bin/day4.rs:95:58 [INFO] [stderr] | [INFO] [stderr] 95 | let minute_most_slept_in = find_minute_most_slept_in(sleep_times.get(&gaurd_who_slept_the_most).unwrap()); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&sleep_times[&gaurd_who_slept_the_most]` [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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:100:23 [INFO] [stderr] | [INFO] [stderr] 100 | fn part2<'a>(entries: &Vec>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] warning: taken reference of right operand [INFO] [stderr] --> src/bin/day4.rs:107:20 [INFO] [stderr] | [INFO] [stderr] 107 | if time > &x.1 { [INFO] [stderr] | ^^^^^^^---- [INFO] [stderr] | | [INFO] [stderr] | help: use the right value directly: `x.1` [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] error: calls to `std::mem::drop` with a reference instead of an owned value. Dropping a reference does nothing. [INFO] [stderr] --> src/bin/day4.rs:111:13 [INFO] [stderr] | [INFO] [stderr] 111 | drop(x); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::drop_ref)] on by default [INFO] [stderr] note: argument has type &mut (usize, usize) [INFO] [stderr] --> src/bin/day4.rs:111:18 [INFO] [stderr] | [INFO] [stderr] 111 | drop(x); [INFO] [stderr] | ^ [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#drop_ref [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: Could not compile `advent2018`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: the loop variable `x` is only used to index `fabric`. [INFO] [stderr] --> src/bin/day3.rs:32:18 [INFO] [stderr] | [INFO] [stderr] 32 | for x in self.left..(self.left+self.width) { [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] 32 | for in fabric.iter_mut().skip(self.left).take(self.width) { [INFO] [stderr] | ^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day3.rs:63:39 [INFO] [stderr] | [INFO] [stderr] 63 | let claims: Vec<_> = CLAIMS.split("\n").map(|c| Claim::from_str(c, &re)).collect(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [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: single-character string constant used as pattern [INFO] [stderr] --> src/bin/day3.rs:76:39 [INFO] [stderr] | [INFO] [stderr] 76 | let claims: Vec<_> = CLAIMS.split("\n").map(|c| Claim::from_str(c, &re)).collect(); [INFO] [stderr] | ^^^^ help: try using a char instead: `'\n'` [INFO] [stderr] | [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: the loop variable `i` is used to index `grid` [INFO] [stderr] --> src/bin/day6.rs:19:14 [INFO] [stderr] | [INFO] [stderr] 19 | for i in 0..grid.len() { [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] 19 | for (i, ) in grid.iter_mut().enumerate() { [INFO] [stderr] | ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the loop variable `i` is only used to index `grid`. [INFO] [stderr] --> src/bin/day6.rs:68:14 [INFO] [stderr] | [INFO] [stderr] 68 | for i in 0..grid.len() { [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] 68 | for in &mut grid { [INFO] [stderr] | ^^^^^^ ^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/day4.rs:63:21 [INFO] [stderr] | [INFO] [stderr] 63 | let mut map = sleep_times.entry(gaurd_id).or_insert_with(HashMap::new); [INFO] [stderr] | ----^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(unused_mut)] on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/bin/day4.rs:105:17 [INFO] [stderr] | [INFO] [stderr] 105 | let mut x = minutes.entry(i).or_insert((0, 0)); // (gaurd_id, number_of_times_asleep) [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:49:33 [INFO] [stderr] | [INFO] [stderr] 49 | fn get_sleep_times<'a>(entries: &Vec>) -> HashMap> { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:91:23 [INFO] [stderr] | [INFO] [stderr] 91 | fn part1<'a>(entries: &Vec>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] warning: called `.get().unwrap()` on a HashMap. Using `[]` is more clear and more concise [INFO] [stderr] --> src/bin/day4.rs:95:58 [INFO] [stderr] | [INFO] [stderr] 95 | let minute_most_slept_in = find_minute_most_slept_in(sleep_times.get(&gaurd_who_slept_the_most).unwrap()); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try this: `&sleep_times[&gaurd_who_slept_the_most]` [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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices. [INFO] [stderr] --> src/bin/day4.rs:100:23 [INFO] [stderr] | [INFO] [stderr] 100 | fn part2<'a>(entries: &Vec>) { [INFO] [stderr] | ^^^^^^^^^^^^^^^ help: change this to: `&[Entry<'a>]` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg [INFO] [stderr] [INFO] [stderr] warning: taken reference of right operand [INFO] [stderr] --> src/bin/day4.rs:107:20 [INFO] [stderr] | [INFO] [stderr] 107 | if time > &x.1 { [INFO] [stderr] | ^^^^^^^---- [INFO] [stderr] | | [INFO] [stderr] | help: use the right value directly: `x.1` [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] error: calls to `std::mem::drop` with a reference instead of an owned value. Dropping a reference does nothing. [INFO] [stderr] --> src/bin/day4.rs:111:13 [INFO] [stderr] | [INFO] [stderr] 111 | drop(x); [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::drop_ref)] on by default [INFO] [stderr] note: argument has type &mut (usize, usize) [INFO] [stderr] --> src/bin/day4.rs:111:18 [INFO] [stderr] | [INFO] [stderr] 111 | drop(x); [INFO] [stderr] | ^ [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#drop_ref [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: Could not compile `advent2018`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "0b738c82600c7131f48f22b9f55c6b6f6753abbf9e6f5091bfe965a718ec4a93"` [INFO] running `"docker" "rm" "-f" "0b738c82600c7131f48f22b9f55c6b6f6753abbf9e6f5091bfe965a718ec4a93"` [INFO] [stdout] 0b738c82600c7131f48f22b9f55c6b6f6753abbf9e6f5091bfe965a718ec4a93