[INFO] updating cached repository ralphrecto/advent-of-code
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ralphrecto/advent-of-code
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ralphrecto/advent-of-code" "work/ex/clippy-test-run/sources/stable/gh/ralphrecto/advent-of-code"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/ralphrecto/advent-of-code'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ralphrecto/advent-of-code" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ralphrecto/advent-of-code"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ralphrecto/advent-of-code'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3854da8857bc6941fd8eb93b33f5a1e7ce922e86
[INFO] sha for GitHub repo ralphrecto/advent-of-code: 3854da8857bc6941fd8eb93b33f5a1e7ce922e86
[INFO] validating manifest of ralphrecto/advent-of-code 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 ralphrecto/advent-of-code 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 ralphrecto/advent-of-code
[INFO] finished frobbing ralphrecto/advent-of-code
[INFO] frobbed toml for ralphrecto/advent-of-code written to work/ex/clippy-test-run/sources/stable/gh/ralphrecto/advent-of-code/Cargo.toml
[INFO] started frobbing ralphrecto/advent-of-code
[INFO] finished frobbing ralphrecto/advent-of-code
[INFO] frobbed toml for ralphrecto/advent-of-code written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ralphrecto/advent-of-code/Cargo.toml
[INFO] crate ralphrecto/advent-of-code 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 ralphrecto/advent-of-code against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/ralphrecto/advent-of-code:/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 -Dclippy::into_iter_on_array" "-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] ea1190b7a50606cbab151262ac8e15df6c91a5e10a79b72079c8f0b2ac96380b
[INFO] running `"docker" "start" "-a" "ea1190b7a50606cbab151262ac8e15df6c91a5e10a79b72079c8f0b2ac96380b"`
[INFO] [stderr]     Checking advent-of-code v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/day3.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         id: id,
[INFO] [stderr]    |         ^^^^^^ help: replace it with: `id`
[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/day3.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |         id: id,
[INFO] [stderr]    |         ^^^^^^ help: replace it with: `id`
[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: unneeded unit return type
[INFO] [stderr]  --> src/day1.rs:4:29
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[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/day1.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |             return n;
[INFO] [stderr]   |             ^^^^^^^^^ help: remove `return` as shown: `n`
[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/day1.rs:15:29
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day1.rs:23:16
[INFO] [stderr]    |
[INFO] [stderr] 23 |             if (seen.contains(&rolling)) {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/day1.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn run() -> () {
[INFO] [stderr]    |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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 unit return type
[INFO] [stderr]  --> src/day2.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run() -> () {
[INFO] [stderr]   |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day3.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/day3.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     return Claim {
[INFO] [stderr] 37 | |         id: id,
[INFO] [stderr] 38 | |         origin_x: origin[0],
[INFO] [stderr] 39 | |         origin_y: origin[1],
[INFO] [stderr] 40 | |         width: dim[0],
[INFO] [stderr] 41 | |         height: dim[1]
[INFO] [stderr] 42 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[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] 36 |     Claim {
[INFO] [stderr] 37 |         id: id,
[INFO] [stderr] 38 |         origin_x: origin[0],
[INFO] [stderr] 39 |         origin_y: origin[1],
[INFO] [stderr] 40 |         width: dim[0],
[INFO] [stderr] 41 |         height: dim[1]
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/day3.rs:64:29
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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 unit return type
[INFO] [stderr]   --> src/day3.rs:83:29
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn pt2(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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/day3.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |         return true;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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/day3.rs:144:14
[INFO] [stderr]     |
[INFO] [stderr] 144 | pub fn run() -> () {
[INFO] [stderr]     |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[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 unit return type
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn main() -> () {
[INFO] [stderr]   |           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]   |
[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 unit return type
[INFO] [stderr]  --> src/day1.rs:4:29
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[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/day1.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |             return n;
[INFO] [stderr]   |             ^^^^^^^^^ help: remove `return` as shown: `n`
[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/day1.rs:15:29
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]   --> src/day1.rs:23:16
[INFO] [stderr]    |
[INFO] [stderr] 23 |             if (seen.contains(&rolling)) {
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/day1.rs:38:14
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn run() -> () {
[INFO] [stderr]    |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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 unit return type
[INFO] [stderr]  --> src/day2.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run() -> () {
[INFO] [stderr]   |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::collections::HashMap`
[INFO] [stderr]  --> src/day3.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::collections::HashMap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/day3.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 36 | /     return Claim {
[INFO] [stderr] 37 | |         id: id,
[INFO] [stderr] 38 | |         origin_x: origin[0],
[INFO] [stderr] 39 | |         origin_y: origin[1],
[INFO] [stderr] 40 | |         width: dim[0],
[INFO] [stderr] 41 | |         height: dim[1]
[INFO] [stderr] 42 | |     };
[INFO] [stderr]    | |______^
[INFO] [stderr]    |
[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] 36 |     Claim {
[INFO] [stderr] 37 |         id: id,
[INFO] [stderr] 38 |         origin_x: origin[0],
[INFO] [stderr] 39 |         origin_y: origin[1],
[INFO] [stderr] 40 |         width: dim[0],
[INFO] [stderr] 41 |         height: dim[1]
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/day3.rs:64:29
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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 unit return type
[INFO] [stderr]   --> src/day3.rs:83:29
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn pt2(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                             ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[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/day3.rs:111:9
[INFO] [stderr]     |
[INFO] [stderr] 111 |         return true;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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/day3.rs:144:14
[INFO] [stderr]     |
[INFO] [stderr] 144 | pub fn run() -> () {
[INFO] [stderr]     |              ^^^^^ help: remove the `-> ()`
[INFO] [stderr]     |
[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 unit return type
[INFO] [stderr]  --> src/main.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn main() -> () {
[INFO] [stderr]   |           ^^^^^ help: remove the `-> ()`
[INFO] [stderr]   |
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/day2.rs:53:51
[INFO] [stderr]    |
[INFO] [stderr] 53 |                                 .filter(|&(c_idx, c)| idx != c_idx)
[INFO] [stderr]    |                                                   ^ help: consider using `_c` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/day2.rs:53:51
[INFO] [stderr]    |
[INFO] [stderr] 53 |                                 .filter(|&(c_idx, c)| idx != c_idx)
[INFO] [stderr]    |                                                   ^ help: consider using `_c` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pt1`
[INFO] [stderr]  --> src/day1.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pt2`
[INFO] [stderr]   --> src/day1.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/day1.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn run() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/day2.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run() -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `within`
[INFO] [stderr]   --> src/day3.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn within(x: i32, y: i32, claim: &Claim) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `intersects`
[INFO] [stderr]   --> src/day3.rs:52:1
[INFO] [stderr]    |
[INFO] [stderr] 52 | fn intersects(a: &Claim, b: &Claim) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pt1`
[INFO] [stderr]   --> src/day3.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/day1.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[INFO] [stderr]   |               ^^^^^^^^^^^^ help: change this to: `&[String]`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/day1.rs:10:11
[INFO] [stderr]    |
[INFO] [stderr] 10 |         }).fold(0, |acc, x| acc + x);
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[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/day1.rs:15:15
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    |               ^^^^^^^^^^^^ help: change this to: `&[String]`
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/day2.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 | /                     match (last_diff_index, diff_count) {
[INFO] [stderr] 50 | |                         (Some(idx), 1) => {
[INFO] [stderr] 51 | |                             let s: String = istr.chars()
[INFO] [stderr] 52 | |                                 .enumerate()
[INFO] [stderr] ...  |
[INFO] [stderr] 59 | |                         _ => {}
[INFO] [stderr] 60 | |                     }
[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] 49 |                     if let (Some(idx), 1) = (last_diff_index, diff_count) {
[INFO] [stderr] 50 |     let s: String = istr.chars()
[INFO] [stderr] 51 |         .enumerate()
[INFO] [stderr] 52 |         .filter(|&(c_idx, c)| idx != c_idx)
[INFO] [stderr] 53 |         .map(|(_, c)| c)
[INFO] [stderr] 54 |         .collect();
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/day3.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn parse_line(line: &String) -> Claim {
[INFO] [stderr]    |                     ^^^^^^^ help: change this to: `&str`
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/day3.rs:15:16
[INFO] [stderr]    |
[INFO] [stderr] 15 |         .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: single-character string constant used as pattern
[INFO] [stderr]   --> src/day3.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |         .split(":")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `':'`
[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/day3.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |         .split(",")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `','`
[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/day3.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |         .split("x")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `'x'`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/day3.rs:64:16
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: change this to: `&[Claim]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/day3.rs:83:16
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn pt2(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: change this to: `&[Claim]`
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/fileutil.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |         s.split("\n")
[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: function is never used: `pt1`
[INFO] [stderr]  --> src/day1.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pt2`
[INFO] [stderr]   --> src/day1.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]   --> src/day1.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn run() -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `run`
[INFO] [stderr]  --> src/day2.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn run() -> () {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pt1`
[INFO] [stderr]   --> src/day3.rs:64:1
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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/day1.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | fn pt1(lines: &Vec<String>) -> () {
[INFO] [stderr]   |               ^^^^^^^^^^^^ help: change this to: `&[String]`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/day1.rs:10:11
[INFO] [stderr]    |
[INFO] [stderr] 10 |         }).fold(0, |acc, x| acc + x);
[INFO] [stderr]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unnecessary_fold)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[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/day1.rs:15:15
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn pt2(lines: &Vec<String>) -> () {
[INFO] [stderr]    |               ^^^^^^^^^^^^ help: change this to: `&[String]`
[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: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/day2.rs:49:21
[INFO] [stderr]    |
[INFO] [stderr] 49 | /                     match (last_diff_index, diff_count) {
[INFO] [stderr] 50 | |                         (Some(idx), 1) => {
[INFO] [stderr] 51 | |                             let s: String = istr.chars()
[INFO] [stderr] 52 | |                                 .enumerate()
[INFO] [stderr] ...  |
[INFO] [stderr] 59 | |                         _ => {}
[INFO] [stderr] 60 | |                     }
[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] 49 |                     if let (Some(idx), 1) = (last_diff_index, diff_count) {
[INFO] [stderr] 50 |     let s: String = istr.chars()
[INFO] [stderr] 51 |         .enumerate()
[INFO] [stderr] 52 |         .filter(|&(c_idx, c)| idx != c_idx)
[INFO] [stderr] 53 |         .map(|(_, c)| c)
[INFO] [stderr] 54 |         .collect();
[INFO] [stderr]  ...
[INFO] [stderr] 
[INFO] [stderr] warning: writing `&String` instead of `&str` involves a new object where a slice will do.
[INFO] [stderr]   --> src/day3.rs:13:21
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn parse_line(line: &String) -> Claim {
[INFO] [stderr]    |                     ^^^^^^^ help: change this to: `&str`
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/day3.rs:15:16
[INFO] [stderr]    |
[INFO] [stderr] 15 |         .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: single-character string constant used as pattern
[INFO] [stderr]   --> src/day3.rs:22:16
[INFO] [stderr]    |
[INFO] [stderr] 22 |         .split(":")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `':'`
[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/day3.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |         .split(",")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `','`
[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/day3.rs:32:16
[INFO] [stderr]    |
[INFO] [stderr] 32 |         .split("x")
[INFO] [stderr]    |                ^^^ help: try using a char instead: `'x'`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/day3.rs:64:16
[INFO] [stderr]    |
[INFO] [stderr] 64 | fn pt1(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: change this to: `&[Claim]`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/day3.rs:83:16
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn pt2(claims: &Vec<Claim>) -> () {
[INFO] [stderr]    |                ^^^^^^^^^^^ help: change this to: `&[Claim]`
[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: single-character string constant used as pattern
[INFO] [stderr]   --> src/fileutil.rs:15:17
[INFO] [stderr]    |
[INFO] [stderr] 15 |         s.split("\n")
[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]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `"docker" "inspect" "ea1190b7a50606cbab151262ac8e15df6c91a5e10a79b72079c8f0b2ac96380b"`
[INFO] running `"docker" "rm" "-f" "ea1190b7a50606cbab151262ac8e15df6c91a5e10a79b72079c8f0b2ac96380b"`
[INFO] [stdout] ea1190b7a50606cbab151262ac8e15df6c91a5e10a79b72079c8f0b2ac96380b