[INFO] updating cached repository sisou/nimiq-rust-miner
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sisou/nimiq-rust-miner
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sisou/nimiq-rust-miner" "work/ex/clippy-test-run/sources/stable/gh/sisou/nimiq-rust-miner"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/sisou/nimiq-rust-miner'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sisou/nimiq-rust-miner" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sisou/nimiq-rust-miner"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sisou/nimiq-rust-miner'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] aa091a492dc0ff43b4e7a8624ae2644487bb3ede
[INFO] sha for GitHub repo sisou/nimiq-rust-miner: aa091a492dc0ff43b4e7a8624ae2644487bb3ede
[INFO] validating manifest of sisou/nimiq-rust-miner 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 sisou/nimiq-rust-miner 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 sisou/nimiq-rust-miner
[INFO] finished frobbing sisou/nimiq-rust-miner
[INFO] frobbed toml for sisou/nimiq-rust-miner written to work/ex/clippy-test-run/sources/stable/gh/sisou/nimiq-rust-miner/Cargo.toml
[INFO] started frobbing sisou/nimiq-rust-miner
[INFO] finished frobbing sisou/nimiq-rust-miner
[INFO] frobbed toml for sisou/nimiq-rust-miner written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sisou/nimiq-rust-miner/Cargo.toml
[INFO] crate sisou/nimiq-rust-miner 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 sisou/nimiq-rust-miner against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/sisou/nimiq-rust-miner:/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] 93643e2ba9b0e848f16fb9615563e332404c43ac59cd9c4d11db85a4dd7f29cb
[INFO] running `"docker" "start" "-a" "93643e2ba9b0e848f16fb9615563e332404c43ac59cd9c4d11db85a4dd7f29cb"`
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking u256 v0.1.0
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]     Checking flame v0.2.2
[INFO] [stderr]     Checking rust-argon2 v0.3.0
[INFO] [stderr]     Checking rust_miner v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: using `println!("")`
[INFO] [stderr]   --> src/main.rs:85:13
[INFO] [stderr]    |
[INFO] [stderr] 85 |             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/main.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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/main.rs:85:13
[INFO] [stderr]    |
[INFO] [stderr] 85 |             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/main.rs:132:5
[INFO] [stderr]     |
[INFO] [stderr] 132 |     println!("");
[INFO] [stderr]     |     ^^^^^^^^^^^^ help: replace it with: `println!()`
[INFO] [stderr]     |
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:94:13
[INFO] [stderr]    |
[INFO] [stderr] 94 |             header[145] = header[145] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[145] += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:98:13
[INFO] [stderr]    |
[INFO] [stderr] 98 |             header[144] = header[144] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[144] += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:102:60
[INFO] [stderr]     |
[INFO] [stderr] 102 |                 let duration = duration.as_secs() as f64 + duration.subsec_nanos() as f64 / 1_000_000_000.0;
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(duration.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 u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:34
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[142])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:61
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[143])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:88
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:115
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                                                   ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[145])`
[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: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:104:33
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 let hash_rate = hash_count as f64 / duration;
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^ help: try: `f64::from(hash_count)`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:105:66
[INFO] [stderr]     |
[INFO] [stderr] 105 |                 println!("Hashes done: {}, hashrate: {:.1} H/s", header[144] as u32 * 256, hash_rate);
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/main.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |             header[143] = header[143] + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[143] += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/main.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |             header[142] = header[142] + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[142] += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:23
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[142])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:50
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[143])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:77
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:104
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[145])`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:94:13
[INFO] [stderr]    |
[INFO] [stderr] 94 |             header[145] = header[145] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[145] += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:98:13
[INFO] [stderr]    |
[INFO] [stderr] 98 |             header[144] = header[144] + 1;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[144] += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:102:60
[INFO] [stderr]     |
[INFO] [stderr] 102 |                 let duration = duration.as_secs() as f64 + duration.subsec_nanos() as f64 / 1_000_000_000.0;
[INFO] [stderr]     |                                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(duration.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 u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:34
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[142])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:61
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                             ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[143])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:88
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                        ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:103:115
[INFO] [stderr]     |
[INFO] [stderr] 103 |                 let hash_count = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                                                   ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[145])`
[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: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:104:33
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 let hash_rate = hash_count as f64 / duration;
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^^^^ help: try: `f64::from(hash_count)`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:105:66
[INFO] [stderr]     |
[INFO] [stderr] 105 |                 println!("Hashes done: {}, hashrate: {:.1} H/s", header[144] as u32 * 256, hash_rate);
[INFO] [stderr]     |                                                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: manual implementation of an assign operation
[INFO] [stderr]    --> src/main.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |             header[143] = header[143] + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[143] += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/main.rs:117:13
[INFO] [stderr]     |
[INFO] [stderr] 117 |             header[142] = header[142] + 1;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `header[142] += 1`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:23
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                       ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[142])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:50
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                  ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[143])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:77
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                             ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[144])`
[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/main.rs:130:104
[INFO] [stderr]     |
[INFO] [stderr] 130 |     let found_nonce = header[142] as u32 * 256 + header[143] as u32 * 256 + header[144] as u32 * 256 + header[145] as u32;
[INFO] [stderr]     |                                                                                                        ^^^^^^^^^^^^^^^^^^ help: try: `u32::from(header[145])`
[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]     Finished dev [unoptimized + debuginfo] target(s) in 3.46s
[INFO] running `"docker" "inspect" "93643e2ba9b0e848f16fb9615563e332404c43ac59cd9c4d11db85a4dd7f29cb"`
[INFO] running `"docker" "rm" "-f" "93643e2ba9b0e848f16fb9615563e332404c43ac59cd9c4d11db85a4dd7f29cb"`
[INFO] [stdout] 93643e2ba9b0e848f16fb9615563e332404c43ac59cd9c4d11db85a4dd7f29cb