[INFO] updating cached repository CJStadler/cryptopals-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CJStadler/cryptopals-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CJStadler/cryptopals-rust" "work/ex/clippy-test-run/sources/stable/gh/CJStadler/cryptopals-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/CJStadler/cryptopals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CJStadler/cryptopals-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CJStadler/cryptopals-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CJStadler/cryptopals-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8d44e31283d4a4cc2200144a6a5cf4060761da55
[INFO] sha for GitHub repo CJStadler/cryptopals-rust: 8d44e31283d4a4cc2200144a6a5cf4060761da55
[INFO] validating manifest of CJStadler/cryptopals-rust 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 CJStadler/cryptopals-rust 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 CJStadler/cryptopals-rust
[INFO] finished frobbing CJStadler/cryptopals-rust
[INFO] frobbed toml for CJStadler/cryptopals-rust written to work/ex/clippy-test-run/sources/stable/gh/CJStadler/cryptopals-rust/Cargo.toml
[INFO] started frobbing CJStadler/cryptopals-rust
[INFO] finished frobbing CJStadler/cryptopals-rust
[INFO] frobbed toml for CJStadler/cryptopals-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/CJStadler/cryptopals-rust/Cargo.toml
[INFO] crate CJStadler/cryptopals-rust 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 CJStadler/cryptopals-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/CJStadler/cryptopals-rust:/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] 8ed026b7dfcb3e3f35774be671e90a542f3c9e7a2cb45c389692cbc3f6b0a48d
[INFO] running `"docker" "start" "-a" "8ed026b7dfcb3e3f35774be671e90a542f3c9e7a2cb45c389692cbc3f6b0a48d"`
[INFO] [stderr]     Checking cryptopals v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant field names in struct initialization
[INFO] [stderr]   --> src/challenges/six.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |             keysize: keysize,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `keysize`
[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/challenges/six.rs:90:13
[INFO] [stderr]    |
[INFO] [stderr] 90 |             keysize: keysize,
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^ help: replace it with: `keysize`
[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: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/challenges/six.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     normalized_distance
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/challenges/six.rs:118:31
[INFO] [stderr]     |
[INFO] [stderr] 118 |     let normalized_distance = (total_edit_distance * precision) / keysize;
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/english_score.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | const CHARS_TO_CHECK: [&'static str; 9] = [" ", "e", "t", "a", "o", "i", "n", "s", "r"];
[INFO] [stderr]   |                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: returning the result of a let binding from a block. Consider returning the expression directly.
[INFO] [stderr]    --> src/challenges/six.rs:120:5
[INFO] [stderr]     |
[INFO] [stderr] 120 |     normalized_distance
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::let_and_return)] on by default
[INFO] [stderr] note: this expression can be directly returned
[INFO] [stderr]    --> src/challenges/six.rs:118:31
[INFO] [stderr]     |
[INFO] [stderr] 118 |     let normalized_distance = (total_edit_distance * precision) / keysize;
[INFO] [stderr]     |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_and_return
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]  --> src/english_score.rs:1:25
[INFO] [stderr]   |
[INFO] [stderr] 1 | const CHARS_TO_CHECK: [&'static str; 9] = [" ", "e", "t", "a", "o", "i", "n", "s", "r"];
[INFO] [stderr]   |                        -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BYTES_PER_BLOCK`
[INFO] [stderr]  --> src/challenges/eight.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const BYTES_PER_BLOCK: usize = 16;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `find_ecb_ciphertext`
[INFO] [stderr]  --> src/challenges/eight.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn find_ecb_ciphertext(ciphertexts: &[Vec<u8>]) -> usize {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `unique_blocks_count`
[INFO] [stderr]   --> src/challenges/eight.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn unique_blocks_count(ciphertext: &[u8]) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `break_into_blocks`
[INFO] [stderr]   --> src/challenges/eight.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn break_into_blocks(ciphertext: &[u8]) -> Vec<&[u8]> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `repeating_key_xor_encode`
[INFO] [stderr]  --> src/challenges/five.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn repeating_key_xor_encode(message: &[u8], key: &[u8]) -> Vec<u8> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_line_in_file`
[INFO] [stderr]  --> src/challenges/four.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub fn decode_line_in_file(filename: &str) -> Vec<u8> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pkcs_pad`
[INFO] [stderr]  --> src/challenges/nine.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn pkcs_pad(message: &[u8], block_length: usize) -> Vec<u8> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pkcs_unpad`
[INFO] [stderr]   --> src/challenges/nine.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn pkcs_unpad(padded_message: &[u8]) -> &[u8] {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hex_to_base64`
[INFO] [stderr]  --> src/challenges/one.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn hex_to_base64(hex: &str) -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_aes_128_ecb`
[INFO] [stderr]  --> src/challenges/seven.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn decode_aes_128_ecb(ciphertext: &[u8], key: &[u8]) -> Vec<u8> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BEST_KEYSIZES_TO_COLLECT`
[INFO] [stderr]  --> src/challenges/six.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const BEST_KEYSIZES_TO_COLLECT: usize = 4;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `MAX_KEYSIZE`
[INFO] [stderr]  --> src/challenges/six.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | const MAX_KEYSIZE: usize = 40;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BLOCKS_TO_CHECK`
[INFO] [stderr]   --> src/challenges/six.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | const BLOCKS_TO_CHECK: usize = 6;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_repeating_key_xor`
[INFO] [stderr]   --> src/challenges/six.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn decode_repeating_key_xor(ciphertext: &[u8]) -> (Vec<u8>, Vec<u8>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_with_keysize`
[INFO] [stderr]   --> src/challenges/six.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | fn decode_with_keysize(ciphertext: &[u8], keysize: usize) -> (Vec<u8>, Vec<u8>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `construct_blocks`
[INFO] [stderr]   --> src/challenges/six.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | fn construct_blocks(ciphertext: &[u8], keysize: usize) -> Vec<Vec<u8>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `find_best_keysizes`
[INFO] [stderr]   --> src/challenges/six.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn find_best_keysizes(ciphertext: &[u8]) -> Vec<usize> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `distance_for_keysize`
[INFO] [stderr]    --> src/challenges/six.rs:105:1
[INFO] [stderr]     |
[INFO] [stderr] 105 | fn distance_for_keysize(ciphertext: &[u8], keysize: usize) -> usize {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `BYTES_PER_BLOCK`
[INFO] [stderr]  --> src/challenges/ten.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | const BYTES_PER_BLOCK: usize = 16;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_cbc_128`
[INFO] [stderr]   --> src/challenges/ten.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | pub fn decode_cbc_128(ciphertext: &[u8], key: &[u8], iv: &[u8]) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `encode_cbc_128`
[INFO] [stderr]   --> src/challenges/ten.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | pub fn encode_cbc_128(message: &[u8], key: &[u8], iv: Vec<u8>) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_aes_128_block`
[INFO] [stderr]   --> src/challenges/ten.rs:45:1
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn decode_aes_128_block(cipherblock: &[u8], key: &[u8]) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `encode_aes_128_block`
[INFO] [stderr]   --> src/challenges/ten.rs:62:1
[INFO] [stderr]    |
[INFO] [stderr] 62 | fn encode_aes_128_block(message_block: &[u8], key: &[u8]) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_xor`
[INFO] [stderr]  --> src/challenges/three.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn decode_xor(encoded: &[u8]) -> (Vec<u8>, u8, usize) {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `decode_with_key`
[INFO] [stderr]   --> src/challenges/three.rs:25:1
[INFO] [stderr]    |
[INFO] [stderr] 25 | fn decode_with_key(encoded: &[u8], key: u8) -> Vec<u8> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `xor_vectors`
[INFO] [stderr]  --> src/challenges/two.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn xor_vectors(a: &[u8], b: &[u8]) -> Vec<u8> {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CHARS_TO_CHECK`
[INFO] [stderr]  --> src/english_score.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | const CHARS_TO_CHECK: [&'static str; 9] = [" ", "e", "t", "a", "o", "i", "n", "s", "r"];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CHAR_FREQUENCIES`
[INFO] [stderr]  --> src/english_score.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | const CHAR_FREQUENCIES: [usize; 9] = [12, 12, 9, 8, 8, 7, 7, 6, 6];
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `english_score`
[INFO] [stderr]  --> src/english_score.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn english_score(text: &[u8]) -> usize {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `distance`
[INFO] [stderr]  --> src/hamming.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn distance(a: &[u8], b: &[u8]) -> usize {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `byte_distance`
[INFO] [stderr]   --> src/hamming.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn byte_distance(a: &u8, b: &u8) -> usize {
[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/hamming.rs:11:21
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn byte_distance(a: &u8, b: &u8) -> usize {
[INFO] [stderr]    |                     ^^^ help: consider passing by value instead: `u8`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/hamming.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn byte_distance(a: &u8, b: &u8) -> usize {
[INFO] [stderr]    |                             ^^^ help: consider passing by value instead: `u8`
[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: the operation is ineffective. Consider reducing it to `power_of_two`
[INFO] [stderr]   --> src/hamming.rs:15:24
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let ones: u8 = power_of_two & 255;
[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: useless use of `vec!`
[INFO] [stderr]   --> src/challenges/nine.rs:50:40
[INFO] [stderr]    |
[INFO] [stderr] 50 |         assert_eq!(message, pkcs_unpad(&vec![1, 2, 3, 3, 3, 3]));
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2, 3, 3, 3, 3]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::useless_vec)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/challenges/nine.rs:51:40
[INFO] [stderr]    |
[INFO] [stderr] 51 |         assert_eq!(message, pkcs_unpad(&vec![1, 2, 3, 1]));
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2, 3, 1]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: useless use of `vec!`
[INFO] [stderr]   --> src/challenges/nine.rs:52:40
[INFO] [stderr]    |
[INFO] [stderr] 52 |         assert_eq!(message, pkcs_unpad(&vec![1, 2, 3, 5, 5, 5, 5, 5]));
[INFO] [stderr]    |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: you can use a slice directly: `&[1, 2, 3, 5, 5, 5, 5, 5]`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#useless_vec
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/hamming.rs:11:21
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn byte_distance(a: &u8, b: &u8) -> usize {
[INFO] [stderr]    |                     ^^^ help: consider passing by value instead: `u8`
[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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/hamming.rs:11:29
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn byte_distance(a: &u8, b: &u8) -> usize {
[INFO] [stderr]    |                             ^^^ help: consider passing by value instead: `u8`
[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: the operation is ineffective. Consider reducing it to `power_of_two`
[INFO] [stderr]   --> src/hamming.rs:15:24
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let ones: u8 = power_of_two & 255;
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `"docker" "inspect" "8ed026b7dfcb3e3f35774be671e90a542f3c9e7a2cb45c389692cbc3f6b0a48d"`
[INFO] running `"docker" "rm" "-f" "8ed026b7dfcb3e3f35774be671e90a542f3c9e7a2cb45c389692cbc3f6b0a48d"`
[INFO] [stdout] 8ed026b7dfcb3e3f35774be671e90a542f3c9e7a2cb45c389692cbc3f6b0a48d