[INFO] updating cached repository marony/rust_euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/marony/rust_euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/marony/rust_euler" "work/ex/clippy-test-run/sources/stable/gh/marony/rust_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/marony/rust_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/marony/rust_euler" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/marony/rust_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/marony/rust_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8cee0b518c8c4b22a4287b91f05ce0f44ff42878
[INFO] sha for GitHub repo marony/rust_euler: 8cee0b518c8c4b22a4287b91f05ce0f44ff42878
[INFO] validating manifest of marony/rust_euler 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 marony/rust_euler 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 marony/rust_euler
[INFO] finished frobbing marony/rust_euler
[INFO] frobbed toml for marony/rust_euler written to work/ex/clippy-test-run/sources/stable/gh/marony/rust_euler/Cargo.toml
[INFO] started frobbing marony/rust_euler
[INFO] finished frobbing marony/rust_euler
[INFO] frobbed toml for marony/rust_euler written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/marony/rust_euler/Cargo.toml
[INFO] crate marony/rust_euler 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 marony/rust_euler against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-3/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/marony/rust_euler:/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] df5174fd0b2b45a1b40f05d959ebc369a377b4d162301e3afb374f32ff9e1619
[INFO] running `"docker" "start" "-a" "df5174fd0b2b45a1b40f05d959ebc369a377b4d162301e3afb374f32ff9e1619"`
[INFO] [stderr]     Checking time v0.1.35
[INFO] [stderr]     Checking euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:53:44
[INFO] [stderr]    |
[INFO] [stderr] 53 |     println!("{:?}", a.take_while(|&f| f < 4000000u64).fold(0, |acc, f| if f % 2 == 0 { acc + f } else { acc }));
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: consider: `4_000_000u64`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:78:31
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let a = prime_factors(600851475143u64, &mut xs);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^ help: consider: `600_851_475_143u64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/main.rs:274:19
[INFO] [stderr]     |
[INFO] [stderr] 274 |         let max = 2000000u64;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider: `2_000_000u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]    --> src/main.rs:322:13
[INFO] [stderr]     |
[INFO] [stderr] 322 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 unit expression
[INFO] [stderr]    --> src/main.rs:333:13
[INFO] [stderr]     |
[INFO] [stderr] 333 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 expression
[INFO] [stderr]    --> src/main.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 expression
[INFO] [stderr]    --> src/main.rs:355:13
[INFO] [stderr]     |
[INFO] [stderr] 355 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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: long literal lacking separators
[INFO] [stderr]    --> src/main.rs:534:19
[INFO] [stderr]     |
[INFO] [stderr] 534 |         let max = 1000000u64;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider: `1_000_000u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:53:44
[INFO] [stderr]    |
[INFO] [stderr] 53 |     println!("{:?}", a.take_while(|&f| f < 4000000u64).fold(0, |acc, f| if f % 2 == 0 { acc + f } else { acc }));
[INFO] [stderr]    |                                            ^^^^^^^^^^ help: consider: `4_000_000u64`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:78:31
[INFO] [stderr]    |
[INFO] [stderr] 78 |         let a = prime_factors(600851475143u64, &mut xs);
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^^ help: consider: `600_851_475_143u64`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/main.rs:274:19
[INFO] [stderr]     |
[INFO] [stderr] 274 |         let max = 2000000u64;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider: `2_000_000u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit expression
[INFO] [stderr]    --> src/main.rs:322:13
[INFO] [stderr]     |
[INFO] [stderr] 322 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 unit expression
[INFO] [stderr]    --> src/main.rs:333:13
[INFO] [stderr]     |
[INFO] [stderr] 333 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 expression
[INFO] [stderr]    --> src/main.rs:344:13
[INFO] [stderr]     |
[INFO] [stderr] 344 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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 expression
[INFO] [stderr]    --> src/main.rs:355:13
[INFO] [stderr]     |
[INFO] [stderr] 355 |             ()
[INFO] [stderr]     |             ^^ help: remove the final `()`
[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: long literal lacking separators
[INFO] [stderr]    --> src/main.rs:534:19
[INFO] [stderr]     |
[INFO] [stderr] 534 |         let max = 1000000u64;
[INFO] [stderr]     |                   ^^^^^^^^^^ help: consider: `1_000_000u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_001`
[INFO] [stderr]   --> src/main.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn problem_001() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fib`
[INFO] [stderr]   --> src/main.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Fib {
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new() -> Fib {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_002`
[INFO] [stderr]   --> src/main.rs:50:1
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn problem_002() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `prime_factors`
[INFO] [stderr]   --> src/main.rs:56:1
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn prime_factors<'a>(n: u64, xs: &'a mut Vec<u64>) -> &'a Vec<u64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_003`
[INFO] [stderr]   --> src/main.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn problem_003() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_palindome`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn is_palindome(n: &u64) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_004`
[INFO] [stderr]   --> src/main.rs:91:1
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn problem_004() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_005`
[INFO] [stderr]    --> src/main.rs:125:1
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn problem_005() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_006`
[INFO] [stderr]    --> src/main.rs:141:1
[INFO] [stderr]     |
[INFO] [stderr] 141 | fn problem_006() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_prime`
[INFO] [stderr]    --> src/main.rs:162:1
[INFO] [stderr]     |
[INFO] [stderr] 162 | fn is_prime(n: &u64) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_007`
[INFO] [stderr]    --> src/main.rs:168:1
[INFO] [stderr]     |
[INFO] [stderr] 168 | fn problem_007() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_008`
[INFO] [stderr]    --> src/main.rs:182:1
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn problem_008() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pythagorean_triplet`
[INFO] [stderr]    --> src/main.rs:230:1
[INFO] [stderr]     |
[INFO] [stderr] 230 | fn pythagorean_triplet(a: u64, b: u64, c: u64) -> Option<u64> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_009`
[INFO] [stderr]    --> src/main.rs:246:1
[INFO] [stderr]     |
[INFO] [stderr] 246 | fn problem_009() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_010`
[INFO] [stderr]    --> src/main.rs:266:1
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn problem_010() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_011`
[INFO] [stderr]    --> src/main.rs:280:1
[INFO] [stderr]     |
[INFO] [stderr] 280 | fn problem_011() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `factors`
[INFO] [stderr]    --> src/main.rs:372:1
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn factors<'a>(n: u64) -> Vec<u64> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangle_number`
[INFO] [stderr]    --> src/main.rs:383:1
[INFO] [stderr]     |
[INFO] [stderr] 383 | fn triangle_number(n: u64) -> u64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_012`
[INFO] [stderr]    --> src/main.rs:389:1
[INFO] [stderr]     |
[INFO] [stderr] 389 | fn problem_012<'a>() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_013`
[INFO] [stderr]    --> src/main.rs:403:1
[INFO] [stderr]     |
[INFO] [stderr] 403 | fn problem_013() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/main.rs:21:46
[INFO] [stderr]    |
[INFO] [stderr] 21 |           .filter(|e| e % 3 == 0 || e % 5 == 0)
[INFO] [stderr]    |  ______________________________________________^
[INFO] [stderr] 22 | |         .fold(0, |acc, e| acc + e);
[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: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     for i in 2u64..(n as f64).sqrt() as u64 + 1 {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `2u64..=(n as f64).sqrt() as u64`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/main.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn is_palindome(n: &u64) -> bool {
[INFO] [stderr]    |                    ^^^^ help: consider passing by value instead: `u64`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_001`
[INFO] [stderr]   --> src/main.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | fn problem_001() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Fib`
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:148:30
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let sum_of_squares = (1..max + 1).fold(0, |acc, n| acc + square(n));
[INFO] [stderr]     |                              ^^^^^^^^^^^^ help: use: `(1..=max)`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#range_plus_one
[INFO] [stderr]   --> src/main.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | struct Fib {
[INFO] [stderr]    | ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/main.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     fn new() -> Fib {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:149:48
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:149:36
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                    ^^^^^^^^^^^^ help: use: `(1..=max)`
[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] 
[INFO] [stderr] warning: function is never used: `problem_002`
[INFO] [stderr]   --> src/main.rs:50:1
[INFO] [stderr]    |
[INFO] [stderr] 50 | fn problem_002() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:155:30
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let sum_of_squares = (1..max + 1).fold(0, |acc, n| acc + square(n));
[INFO] [stderr]     |                              ^^^^^^^^^^^^ help: use: `(1..=max)`
[INFO] [stderr] warning: function is never used: `prime_factors`
[INFO] [stderr]   --> src/main.rs:56:1
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn prime_factors<'a>(n: u64, xs: &'a mut Vec<u64>) -> &'a Vec<u64> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:156:48
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:156:36
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                    ^^^^^^^^^^^^ help: use: `(1..=max)`
[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: function is never used: `problem_003`
[INFO] [stderr]   --> src/main.rs:69:1
[INFO] [stderr]    |
[INFO] [stderr] 69 | fn problem_003() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_palindome`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn is_palindome(n: &u64) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:162:16
[INFO] [stderr]     |
[INFO] [stderr] 162 | fn is_prime(n: &u64) -> bool {
[INFO] [stderr]     |                ^^^^ help: consider passing by value instead: `u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_004`
[INFO] [stderr]   --> src/main.rs:91:1
[INFO] [stderr]    |
[INFO] [stderr] 91 | fn problem_004() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:163:6
[INFO] [stderr]     |
[INFO] [stderr] 163 |     !(2u64..(*n as f64).sqrt() as u64 + 1).any(|x| n % x == 0)
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `(2u64..=(*n as f64).sqrt() as u64)`
[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] 
[INFO] [stderr] warning: function is never used: `problem_005`
[INFO] [stderr]    --> src/main.rs:125:1
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn problem_005() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_006`
[INFO] [stderr]    --> src/main.rs:141:1
[INFO] [stderr]     |
[INFO] [stderr] 141 | fn problem_006() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_prime`
[INFO] [stderr]    --> src/main.rs:162:1
[INFO] [stderr]     |
[INFO] [stderr] 162 | fn is_prime(n: &u64) -> bool {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_007`
[INFO] [stderr]    --> src/main.rs:168:1
[INFO] [stderr]     |
[INFO] [stderr] 168 | fn problem_007() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_008`
[INFO] [stderr]    --> src/main.rs:182:1
[INFO] [stderr]     |
[INFO] [stderr] 182 | fn problem_008() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pythagorean_triplet`
[INFO] [stderr]    --> src/main.rs:230:1
[INFO] [stderr]     |
[INFO] [stderr] 230 | fn pythagorean_triplet(a: u64, b: u64, c: u64) -> Option<u64> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_009`
[INFO] [stderr]    --> src/main.rs:246:1
[INFO] [stderr]     |
[INFO] [stderr] 246 | fn problem_009() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_010`
[INFO] [stderr]    --> src/main.rs:266:1
[INFO] [stderr]     |
[INFO] [stderr] 266 | fn problem_010() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_011`
[INFO] [stderr]    --> src/main.rs:280:1
[INFO] [stderr]     |
[INFO] [stderr] 280 | fn problem_011() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `factors`
[INFO] [stderr]    --> src/main.rs:372:1
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn factors<'a>(n: u64) -> Vec<u64> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `triangle_number`
[INFO] [stderr]    --> src/main.rs:383:1
[INFO] [stderr]     |
[INFO] [stderr] 383 | fn triangle_number(n: u64) -> u64 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_012`
[INFO] [stderr]    --> src/main.rs:389:1
[INFO] [stderr]     |
[INFO] [stderr] 389 | fn problem_012<'a>() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `problem_013`
[INFO] [stderr]    --> src/main.rs:403:1
[INFO] [stderr]     |
[INFO] [stderr] 403 | fn problem_013() {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]   --> src/main.rs:21:46
[INFO] [stderr]    |
[INFO] [stderr] 21 |           .filter(|e| e % 3 == 0 || e % 5 == 0)
[INFO] [stderr]    |  ______________________________________________^
[INFO] [stderr] 22 | |         .fold(0, |acc, e| acc + e);
[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: an inclusive range would be more readable
[INFO] [stderr]   --> src/main.rs:57:14
[INFO] [stderr]    |
[INFO] [stderr] 57 |     for i in 2u64..(n as f64).sqrt() as u64 + 1 {
[INFO] [stderr]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `2u64..=(n as f64).sqrt() as u64`
[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/main.rs:209:18
[INFO] [stderr]     |
[INFO] [stderr] 209 |         for i in 0..s.len() - len + 1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=s.len() - len`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:211:23
[INFO] [stderr]     |
[INFO] [stderr] 211 |             let n = ns.fold(1, |acc, n| acc * n);
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:221:18
[INFO] [stderr]     |
[INFO] [stderr] 221 |         for i in 0..s.len() - len + 1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=s.len() - len`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |             let n = ns.fold(1, |acc, n| acc * n);
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/main.rs:83:20
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn is_palindome(n: &u64) -> bool {
[INFO] [stderr]    |                    ^^^^ help: consider passing by value instead: `u64`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::trivially_copy_pass_by_ref)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[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/main.rs:253:25
[INFO] [stderr]     |
[INFO] [stderr] 253 | /                         match pythagorean_triplet(a, b, c) {
[INFO] [stderr] 254 | |                             Some(n) => println!("{} ** 2 * {} ** 2 = {} ** 2 -> {}", a, b, c, n),
[INFO] [stderr] 255 | |                             None => ()
[INFO] [stderr] 256 | |                         }
[INFO] [stderr]     | |_________________________^ help: try this: `if let Some(n) = pythagorean_triplet(a, b, c) { println!("{} ** 2 * {} ** 2 = {} ** 2 -> {}", a, b, c, n) }`
[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] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:270:52
[INFO] [stderr]     |
[INFO] [stderr] 270 |         let a = (2u64..max).filter(|n| is_prime(n)).fold(0, |acc, n| acc + n);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:148:30
[INFO] [stderr]     |
[INFO] [stderr] 148 |         let sum_of_squares = (1..max + 1).fold(0, |acc, n| acc + square(n));
[INFO] [stderr]     |                              ^^^^^^^^^^^^ help: use: `(1..=max)`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:149:48
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr]    --> src/main.rs:275:52
[INFO] [stderr]     |
[INFO] [stderr] 275 |         let a = (2u64..max).filter(|n| is_prime(n)).fold(0, |acc, n| acc + n);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:149:36
[INFO] [stderr]     |
[INFO] [stderr] 149 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                    ^^^^^^^^^^^^ help: use: `(1..=max)`
[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/main.rs:155:30
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let sum_of_squares = (1..max + 1).fold(0, |acc, n| acc + square(n));
[INFO] [stderr]     |                              ^^^^^^^^^^^^ help: use: `(1..=max)`
[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: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:156:48
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:156:36
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let square_of_sum = square((1..max + 1).fold(0, |acc, n| acc + n));
[INFO] [stderr]     |                                    ^^^^^^^^^^^^ help: use: `(1..=max)`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]    --> src/main.rs:162:16
[INFO] [stderr]     |
[INFO] [stderr] 162 | fn is_prime(n: &u64) -> bool {
[INFO] [stderr]     |                ^^^^ help: consider passing by value instead: `u64`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:163:6
[INFO] [stderr]     |
[INFO] [stderr] 163 |     !(2u64..(*n as f64).sqrt() as u64 + 1).any(|x| n % x == 0)
[INFO] [stderr]     |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `(2u64..=(*n as f64).sqrt() as u64)`
[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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]    --> src/main.rs:308:25
[INFO] [stderr]     |
[INFO] [stderr] 308 |     fn get_nums<'a>(ss: &'a Vec<i32>, index: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]     |                         ^^^^^^^^^^^^ help: change this to: `&[i32]`
[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: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:209:18
[INFO] [stderr]     |
[INFO] [stderr] 209 |         for i in 0..s.len() - len + 1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=s.len() - len`
[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: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:314:23
[INFO] [stderr]     |
[INFO] [stderr] 314 |         let is = vec![(index + 0) as usize, (index + 1) as usize, (index + 2) as usize, (index + 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_op)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:211:23
[INFO] [stderr]     |
[INFO] [stderr] 211 |             let n = ns.fold(1, |acc, n| acc * n);
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:221:18
[INFO] [stderr]     |
[INFO] [stderr] 221 |         for i in 0..s.len() - len + 1 {
[INFO] [stderr]     |                  ^^^^^^^^^^^^^^^^^^^^ help: use: `0..=s.len() - len`
[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: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:315:31
[INFO] [stderr]     |
[INFO] [stderr] 315 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i / SLEN as usize) == y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:315:31
[INFO] [stderr]     |
[INFO] [stderr] 315 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i / SLEN as usize) == y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:223:23
[INFO] [stderr]     |
[INFO] [stderr] 223 |             let n = ns.fold(1, |acc, n| acc * n);
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:325:23
[INFO] [stderr]     |
[INFO] [stderr] 325 |         let is = vec![(index + 0) as usize, (index + SLEN) as usize, (index + SLEN * 2) as usize, (index + SLEN * 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:326:31
[INFO] [stderr]     |
[INFO] [stderr] 326 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) == x) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:326:31
[INFO] [stderr]     |
[INFO] [stderr] 326 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) == x) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:336:23
[INFO] [stderr]     |
[INFO] [stderr] 336 |         let is = vec![(index + 0) as usize, (index + SLEN + 1) as usize, (index + SLEN * 2 + 2) as usize, (index + SLEN * 3 + 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[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/main.rs:253:25
[INFO] [stderr]     |
[INFO] [stderr] 253 | /                         match pythagorean_triplet(a, b, c) {
[INFO] [stderr] 254 | |                             Some(n) => println!("{} ** 2 * {} ** 2 = {} ** 2 -> {}", a, b, c, n),
[INFO] [stderr] 255 | |                             None => ()
[INFO] [stderr] 256 | |                         }
[INFO] [stderr]     | |_________________________^ help: try this: `if let Some(n) = pythagorean_triplet(a, b, c) { println!("{} ** 2 * {} ** 2 = {} ** 2 -> {}", a, b, c, n) }`
[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] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:337:31
[INFO] [stderr]     |
[INFO] [stderr] 337 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) >= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:337:31
[INFO] [stderr]     |
[INFO] [stderr] 337 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) >= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:347:23
[INFO] [stderr]     |
[INFO] [stderr] 347 |         let is = vec![(index + 0) as usize, (index + SLEN - 1) as usize, (index + SLEN * 2 - 2) as usize, (index + SLEN * 3 - 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr]    --> src/main.rs:270:52
[INFO] [stderr]     |
[INFO] [stderr] 270 |         let a = (2u64..max).filter(|n| is_prime(n)).fold(0, |acc, n| acc + n);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr] 
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:275:52
[INFO] [stderr]     |
[INFO] [stderr] 275 |         let a = (2u64..max).filter(|n| is_prime(n)).fold(0, |acc, n| acc + n);
[INFO] [stderr]     |                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:348:31
[INFO] [stderr]     |
[INFO] [stderr] 348 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) <= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:348:31
[INFO] [stderr]     |
[INFO] [stderr] 348 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) <= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:365:42
[INFO] [stderr]     |
[INFO] [stderr] 365 |                 a = cmp::max(a, ns.iter().fold(1, |acc, &n| acc * n));
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/main.rs:372:12
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn factors<'a>(n: u64) -> Vec<u64> {
[INFO] [stderr]     |            ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[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/main.rs:308:25
[INFO] [stderr]     |
[INFO] [stderr] 308 |     fn get_nums<'a>(ss: &'a Vec<i32>, index: i32) -> Vec<Vec<i32>> {
[INFO] [stderr]     |                         ^^^^^^^^^^^^ help: change this to: `&[i32]`
[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: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:374:14
[INFO] [stderr]     |
[INFO] [stderr] 374 |     for i in 1u64..(n as f64).sqrt() as u64 + 1 {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `1u64..=(n as f64).sqrt() as u64`
[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: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/main.rs:389:16
[INFO] [stderr]     |
[INFO] [stderr] 389 | fn problem_012<'a>() {
[INFO] [stderr]     |                ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:314:23
[INFO] [stderr]     |
[INFO] [stderr] 314 |         let is = vec![(index + 0) as usize, (index + 1) as usize, (index + 2) as usize, (index + 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::identity_op)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:315:31
[INFO] [stderr]     |
[INFO] [stderr] 315 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i / SLEN as usize) == y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_comparisons)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:315:31
[INFO] [stderr]     |
[INFO] [stderr] 315 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i / SLEN as usize) == y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[deny(clippy::absurd_extreme_comparisons)] on by default
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:325:23
[INFO] [stderr]     |
[INFO] [stderr] 325 |         let is = vec![(index + 0) as usize, (index + SLEN) as usize, (index + SLEN * 2) as usize, (index + SLEN * 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:512:22
[INFO] [stderr]     |
[INFO] [stderr] 512 |         let a = lines.fold(0, |acc, n| acc + n).to_string();
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:326:31
[INFO] [stderr]     |
[INFO] [stderr] 326 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) == x) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:326:31
[INFO] [stderr]     |
[INFO] [stderr] 326 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) == x) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:336:23
[INFO] [stderr]     |
[INFO] [stderr] 336 |         let is = vec![(index + 0) as usize, (index + SLEN + 1) as usize, (index + SLEN * 2 + 2) as usize, (index + SLEN * 3 + 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:337:31
[INFO] [stderr]     |
[INFO] [stderr] 337 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) >= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:337:31
[INFO] [stderr]     |
[INFO] [stderr] 337 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) >= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: the operation is ineffective. Consider reducing it to `index`
[INFO] [stderr]    --> src/main.rs:347:23
[INFO] [stderr]     |
[INFO] [stderr] 347 |         let is = vec![(index + 0) as usize, (index + SLEN - 1) as usize, (index + SLEN * 2 - 2) as usize, (index + SLEN * 3 - 3) as usize];
[INFO] [stderr]     |                       ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#identity_op
[INFO] [stderr] 
[INFO] [stderr] warning: comparison is useless due to type limits
[INFO] [stderr]    --> src/main.rs:348:31
[INFO] [stderr]     |
[INFO] [stderr] 348 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) <= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: this comparison involving the minimum or maximum element for this type contains a case that is always true or always false
[INFO] [stderr]    --> src/main.rs:348:31
[INFO] [stderr]     |
[INFO] [stderr] 348 |         if is.iter().all(|&i| 0 <= i && i < (SLEN * SLEN) as usize && (i % SLEN as usize) <= x && (i / SLEN as usize) >= y) {
[INFO] [stderr]     |                               ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: because 0 is the minimum value for this type, this comparison is always true
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#absurd_extreme_comparisons
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:365:42
[INFO] [stderr]     |
[INFO] [stderr] 365 |                 a = cmp::max(a, ns.iter().fold(1, |acc, &n| acc * n));
[INFO] [stderr]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.product()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] warning: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/main.rs:372:12
[INFO] [stderr]     |
[INFO] [stderr] 372 | fn factors<'a>(n: u64) -> Vec<u64> {
[INFO] [stderr]     |            ^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::extra_unused_lifetimes)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: an inclusive range would be more readable
[INFO] [stderr]    --> src/main.rs:374:14
[INFO] [stderr]     |
[INFO] [stderr] 374 |     for i in 1u64..(n as f64).sqrt() as u64 + 1 {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use: `1u64..=(n as f64).sqrt() as u64`
[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: this lifetime isn't used in the function definition
[INFO] [stderr]    --> src/main.rs:389:16
[INFO] [stderr]     |
[INFO] [stderr] 389 | fn problem_012<'a>() {
[INFO] [stderr]     |                ^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#extra_unused_lifetimes
[INFO] [stderr] 
[INFO] [stderr] warning: this `.fold` can be written more succinctly using another method
[INFO] [stderr]    --> src/main.rs:512:22
[INFO] [stderr]     |
[INFO] [stderr] 512 |         let a = lines.fold(0, |acc, n| acc + n).to_string();
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `.sum()`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_fold
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Could not compile `euler`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "df5174fd0b2b45a1b40f05d959ebc369a377b4d162301e3afb374f32ff9e1619"`
[INFO] running `"docker" "rm" "-f" "df5174fd0b2b45a1b40f05d959ebc369a377b4d162301e3afb374f32ff9e1619"`
[INFO] [stdout] df5174fd0b2b45a1b40f05d959ebc369a377b4d162301e3afb374f32ff9e1619