[INFO] updating cached repository pavacicp/foo-chess [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/pavacicp/foo-chess [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/pavacicp/foo-chess" "work/ex/clippy-test-run/sources/stable/gh/pavacicp/foo-chess"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/pavacicp/foo-chess'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/pavacicp/foo-chess" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pavacicp/foo-chess"` [INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pavacicp/foo-chess'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 4a261953ba6f68cc75b1772da323963021cbb816 [INFO] sha for GitHub repo pavacicp/foo-chess: 4a261953ba6f68cc75b1772da323963021cbb816 [INFO] validating manifest of pavacicp/foo-chess 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 pavacicp/foo-chess 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 pavacicp/foo-chess [INFO] finished frobbing pavacicp/foo-chess [INFO] frobbed toml for pavacicp/foo-chess written to work/ex/clippy-test-run/sources/stable/gh/pavacicp/foo-chess/Cargo.toml [INFO] started frobbing pavacicp/foo-chess [INFO] finished frobbing pavacicp/foo-chess [INFO] frobbed toml for pavacicp/foo-chess written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/pavacicp/foo-chess/Cargo.toml [INFO] crate pavacicp/foo-chess has a lockfile. skipping [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] [stderr] Blocking waiting for file lock on the registry index [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] linting pavacicp/foo-chess 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/pavacicp/foo-chess:/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] ff194f27bcf5b7b73678d3749e7487d50ee09b3d405145088a8cdebf34b129c6 [INFO] running `"docker" "start" "-a" "ff194f27bcf5b7b73678d3749e7487d50ee09b3d405145088a8cdebf34b129c6"` [INFO] [stderr] Compiling crunchy v0.1.6 [INFO] [stderr] Checking tiny-keccak v1.4.2 [INFO] [stderr] Checking foo-chess v0.1.0 (/opt/crater/workdir) [INFO] [stderr] warning: using `println!("")` [INFO] [stderr] --> src/board.rs:49:4 [INFO] [stderr] | [INFO] [stderr] 49 | println!(""); [INFO] [stderr] | ^^^^^^^^^^^^ help: replace it with: `println!()` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::println_empty_string)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string [INFO] [stderr] [INFO] [stderr] warning: using `println!("")` [INFO] [stderr] --> src/board.rs:49:4 [INFO] [stderr] | [INFO] [stderr] 49 | println!(""); [INFO] [stderr] | ^^^^^^^^^^^^ help: replace it with: `println!()` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::println_empty_string)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#println_empty_string [INFO] [stderr] [INFO] [stderr] warning: long literal lacking separators [INFO] [stderr] --> src/block.rs:66:48 [INFO] [stderr] | [INFO] [stderr] 66 | let starting_nonce_perthread_increase: u64 = 18446744073709551614 as u64 / (NUM_THREADS + 1) as u64; // could be better [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: consider: `18_446_744_073_709_551_614` [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: unneeded return statement [INFO] [stderr] --> src/input_console.rs:29:13 [INFO] [stderr] | [INFO] [stderr] 29 | return Ok( (row, column) ); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok( (row, column) )` [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 return statement [INFO] [stderr] --> src/input_console.rs:32:16 [INFO] [stderr] | [INFO] [stderr] 32 | _ => { return Err("Wrong input, enter one number and one letter!".to_string()); } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Wrong input, enter one number and one letter!".to_string())` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/input_console.rs:52:13 [INFO] [stderr] | [INFO] [stderr] 52 | return char::from_u32(selection_number -1 + starting_figure).expect("Unable to turn number to char in swap_figure #3") [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `char::from_u32(selection_number -1 + starting_figure).expect("Unable to turn number to char in swap_figure #3")` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/input_console.rs:54:24 [INFO] [stderr] | [INFO] [stderr] 54 | Err(_dummy) => return char::from_u32(starting_figure).expect("Unable to turn number to char in swap_figure #4"), // default to queen [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `char::from_u32(starting_figure).expect("Unable to turn number to char in swap_figure #4")` [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: long literal lacking separators [INFO] [stderr] --> src/block.rs:66:48 [INFO] [stderr] | [INFO] [stderr] 66 | let starting_nonce_perthread_increase: u64 = 18446744073709551614 as u64 / (NUM_THREADS + 1) as u64; // could be better [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^ help: consider: `18_446_744_073_709_551_614` [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: unneeded return statement [INFO] [stderr] --> src/input_console.rs:29:13 [INFO] [stderr] | [INFO] [stderr] 29 | return Ok( (row, column) ); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Ok( (row, column) )` [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 return statement [INFO] [stderr] --> src/input_console.rs:32:16 [INFO] [stderr] | [INFO] [stderr] 32 | _ => { return Err("Wrong input, enter one number and one letter!".to_string()); } [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `Err("Wrong input, enter one number and one letter!".to_string())` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/input_console.rs:52:13 [INFO] [stderr] | [INFO] [stderr] 52 | return char::from_u32(selection_number -1 + starting_figure).expect("Unable to turn number to char in swap_figure #3") [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `char::from_u32(selection_number -1 + starting_figure).expect("Unable to turn number to char in swap_figure #3")` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return [INFO] [stderr] [INFO] [stderr] warning: unneeded return statement [INFO] [stderr] --> src/input_console.rs:54:24 [INFO] [stderr] | [INFO] [stderr] 54 | Err(_dummy) => return char::from_u32(starting_figure).expect("Unable to turn number to char in swap_figure #4"), // default to queen [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `char::from_u32(starting_figure).expect("Unable to turn number to char in swap_figure #4")` [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: function is never used: `movement_input` [INFO] [stderr] --> src/input_console.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | pub fn movement_input() -> ValidMovement { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `swap_figure_input` [INFO] [stderr] --> src/input_console.rs:37:1 [INFO] [stderr] | [INFO] [stderr] 37 | pub fn swap_figure_input(color: i32) -> char { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error: this `if` has identical blocks [INFO] [stderr] --> src/figure.rs:86:54 [INFO] [stderr] | [INFO] [stderr] 86 | else if current_pos.0 == 7 && icon == BLACK_PAWN { (2 as i32) } [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::if_same_then_else)] on by default [INFO] [stderr] note: same as this [INFO] [stderr] --> src/figure.rs:85:49 [INFO] [stderr] | [INFO] [stderr] 85 | if current_pos.0 == 2 && icon == WHITE_PAWN { (2 as i32) } [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else [INFO] [stderr] [INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value [INFO] [stderr] --> src/figure.rs:134:51 [INFO] [stderr] | [INFO] [stderr] 134 | fn check_lane(mut pos: (i32, i32), requested_pos: &(i32, i32), move_angle: usize, mut max_moves: i32, board: &Board) -> Result { [INFO] [stderr] | ^^^^^^^^^^^ help: consider passing by value instead: `(i32, i32)` [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] error: this .into_iter() call is equivalent to .iter() and will not move the array [INFO] [stderr] --> src/board.rs:45:25 [INFO] [stderr] | [INFO] [stderr] 45 | for row in self.board.into_iter().rev() { [INFO] [stderr] | ^^^^^^^^^ help: call directly: `iter` [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::into_iter_on_array)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_array [INFO] [stderr] [INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value [INFO] [stderr] --> src/board.rs:76:43 [INFO] [stderr] | [INFO] [stderr] 76 | pub fn set_field_content(&mut self, pos: &(i32, i32), icon: char) { [INFO] [stderr] | ^^^^^^^^^^^ help: consider passing by value instead: `(i32, i32)` [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: casting u32 to u64 may become silently lossy if types change [INFO] [stderr] --> src/block.rs:28:51 [INFO] [stderr] | [INFO] [stderr] 28 | let time_stamp = since_epoch.as_secs() * 1000 + since_epoch.subsec_nanos() as u64 / 1_000_000; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(since_epoch.subsec_nanos())` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::cast_lossless)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change [INFO] [stderr] --> src/block.rs:66:78 [INFO] [stderr] | [INFO] [stderr] 66 | let starting_nonce_perthread_increase: u64 = 18446744073709551614 as u64 / (NUM_THREADS + 1) as u64; // could be better [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(NUM_THREADS + 1)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] warning: Consider using an AtomicBool instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>. [INFO] [stderr] --> src/block.rs:68:30 [INFO] [stderr] | [INFO] [stderr] 68 | let nonce_found = Arc::new(Mutex::new(false)); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::mutex_atomic)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic [INFO] [stderr] [INFO] [stderr] warning: function is never used: `movement_input` [INFO] [stderr] --> src/input_console.rs:5:1 [INFO] [stderr] | [INFO] [stderr] 5 | pub fn movement_input() -> ValidMovement { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(dead_code)] on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `swap_figure_input` [INFO] [stderr] --> src/input_console.rs:37:1 [INFO] [stderr] | [INFO] [stderr] 37 | pub fn swap_figure_input(color: i32) -> char { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: casting u8 to i32 may become silently lossy if types change [INFO] [stderr] --> src/input_console.rs:24:21 [INFO] [stderr] | [INFO] [stderr] 24 | (lett.to_ascii_uppercase() as u8 - 64) as i32 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `i32::from(lett.to_ascii_uppercase() as u8 - 64)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] error: Could not compile `foo-chess`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: this `if` has identical blocks [INFO] [stderr] --> src/figure.rs:86:54 [INFO] [stderr] | [INFO] [stderr] 86 | else if current_pos.0 == 7 && icon == BLACK_PAWN { (2 as i32) } [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::if_same_then_else)] on by default [INFO] [stderr] note: same as this [INFO] [stderr] --> src/figure.rs:85:49 [INFO] [stderr] | [INFO] [stderr] 85 | if current_pos.0 == 2 && icon == WHITE_PAWN { (2 as i32) } [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#if_same_then_else [INFO] [stderr] [INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value [INFO] [stderr] --> src/figure.rs:134:51 [INFO] [stderr] | [INFO] [stderr] 134 | fn check_lane(mut pos: (i32, i32), requested_pos: &(i32, i32), move_angle: usize, mut max_moves: i32, board: &Board) -> Result { [INFO] [stderr] | ^^^^^^^^^^^ help: consider passing by value instead: `(i32, i32)` [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] error: this .into_iter() call is equivalent to .iter() and will not move the array [INFO] [stderr] --> src/board.rs:45:25 [INFO] [stderr] | [INFO] [stderr] 45 | for row in self.board.into_iter().rev() { [INFO] [stderr] | ^^^^^^^^^ help: call directly: `iter` [INFO] [stderr] | [INFO] [stderr] = note: #[deny(clippy::into_iter_on_array)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_array [INFO] [stderr] [INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value [INFO] [stderr] --> src/board.rs:76:43 [INFO] [stderr] | [INFO] [stderr] 76 | pub fn set_field_content(&mut self, pos: &(i32, i32), icon: char) { [INFO] [stderr] | ^^^^^^^^^^^ help: consider passing by value instead: `(i32, i32)` [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: casting u32 to u64 may become silently lossy if types change [INFO] [stderr] --> src/block.rs:28:51 [INFO] [stderr] | [INFO] [stderr] 28 | let time_stamp = since_epoch.as_secs() * 1000 + since_epoch.subsec_nanos() as u64 / 1_000_000; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(since_epoch.subsec_nanos())` [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::cast_lossless)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change [INFO] [stderr] --> src/block.rs:66:78 [INFO] [stderr] | [INFO] [stderr] 66 | let starting_nonce_perthread_increase: u64 = 18446744073709551614 as u64 / (NUM_THREADS + 1) as u64; // could be better [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(NUM_THREADS + 1)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] warning: Consider using an AtomicBool instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>. [INFO] [stderr] --> src/block.rs:68:30 [INFO] [stderr] | [INFO] [stderr] 68 | let nonce_found = Arc::new(Mutex::new(false)); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: #[warn(clippy::mutex_atomic)] on by default [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic [INFO] [stderr] [INFO] [stderr] warning: casting u8 to i32 may become silently lossy if types change [INFO] [stderr] --> src/input_console.rs:24:21 [INFO] [stderr] | [INFO] [stderr] 24 | (lett.to_ascii_uppercase() as u8 - 64) as i32 [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `i32::from(lett.to_ascii_uppercase() as u8 - 64)` [INFO] [stderr] | [INFO] [stderr] = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors [INFO] [stderr] [INFO] [stderr] error: Could not compile `foo-chess`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "ff194f27bcf5b7b73678d3749e7487d50ee09b3d405145088a8cdebf34b129c6"` [INFO] running `"docker" "rm" "-f" "ff194f27bcf5b7b73678d3749e7487d50ee09b3d405145088a8cdebf34b129c6"` [INFO] [stdout] ff194f27bcf5b7b73678d3749e7487d50ee09b3d405145088a8cdebf34b129c6