[INFO] crate ethash 0.3.1 is already in cache
[INFO] extracting crate ethash 0.3.1 into work/ex/clippy-test-run/sources/stable/reg/ethash/0.3.1
[INFO] extracting crate ethash 0.3.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ethash/0.3.1
[INFO] validating manifest of ethash-0.3.1 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 ethash-0.3.1 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 ethash-0.3.1
[INFO] finished frobbing ethash-0.3.1
[INFO] frobbed toml for ethash-0.3.1 written to work/ex/clippy-test-run/sources/stable/reg/ethash/0.3.1/Cargo.toml
[INFO] started frobbing ethash-0.3.1
[INFO] finished frobbing ethash-0.3.1
[INFO] frobbed toml for ethash-0.3.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/ethash/0.3.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 ethash-0.3.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/ethash/0.3.1:/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] e8a5b725d9ca1a9bded360b326130c982ce7e04a26991e5144e2a5d4718ced7a
[INFO] running `"docker" "start" "-a" "e8a5b725d9ca1a9bded360b326130c982ce7e04a26991e5144e2a5d4718ced7a"`
[INFO] [stderr]     Checking elastic-array-plus v0.9.1
[INFO] [stderr]     Checking ethereum-hexutil v0.2.3
[INFO] [stderr]     Checking blockchain v0.2.0
[INFO] [stderr]     Checking blockchain v0.1.9
[INFO] [stderr]     Checking block-buffer v0.2.0
[INFO] [stderr]     Checking hmac v0.4.2
[INFO] [stderr]     Checking hmac-drbg v0.1.2
[INFO] [stderr]     Checking sha2 v0.6.0
[INFO] [stderr]     Checking sha3 v0.6.0
[INFO] [stderr]     Checking libsecp256k1 v0.1.15
[INFO] [stderr]     Checking ethereum-rlp v0.2.3
[INFO] [stderr]     Checking ethereum-bigint v0.2.9
[INFO] [stderr]     Checking ethereum-trie v0.3.8
[INFO] [stderr]     Checking ethereum-block-core v0.1.0
[INFO] [stderr]     Checking ethereum-bloom v0.2.1
[INFO] [stderr]     Checking ethash v0.3.1 (/opt/crater/workdir)
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/miller_rabin.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let t = (x as isize >> 63) as usize;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/lib.rs:91:21
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let b = cache[v * 64 + j];
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:215:17
[INFO] [stderr]     |
[INFO] [stderr] 215 |             let v = lookup(p + j);
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:225:13
[INFO] [stderr]     |
[INFO] [stderr] 225 |         let a = fnv((&mix[(j * 4)..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:227:13
[INFO] [stderr]     |
[INFO] [stderr] 227 |         let b = fnv(a, (&mix[((j + 2) * 4)..]).read_u32::<LittleEndian>().unwrap());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:228:13
[INFO] [stderr]     |
[INFO] [stderr] 228 |         let c = fnv(b, (&mix[((j + 3) * 4)..]).read_u32::<LittleEndian>().unwrap());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:237:17
[INFO] [stderr]     |
[INFO] [stderr] 237 |         let mut z = [0u8; 32];
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:84:18
[INFO] [stderr]    |
[INFO] [stderr] 84 |     const HINT: &'static [usize] = &[2];
[INFO] [stderr]    |                 -^^^^^^^-------- help: consider removing `'static`: `&[usize]`
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:90:23
[INFO] [stderr]    |
[INFO] [stderr] 90 |     const WITNESSES: &'static [(usize, &'static [usize])] =
[INFO] [stderr]    |                      -^^^^^^^---------------------------- help: consider removing `'static`: `&[(usize, &'static [usize])]`
[INFO] [stderr]    |
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:90:41
[INFO] [stderr]    |
[INFO] [stderr] 90 |     const WITNESSES: &'static [(usize, &'static [usize])] =
[INFO] [stderr]    |                                        -^^^^^^^-------- help: consider removing `'static`: `&[usize]`
[INFO] [stderr]    |
[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: long literal lacking separators
[INFO] [stderr]   --> src/miller_rabin.rs:96:46
[INFO] [stderr]    |
[INFO] [stderr] 96 |             (1_112_004_669_632, &[2, 13, 23, 1662803]),
[INFO] [stderr]    |                                              ^^^^^^^ help: consider: `1_662_803`
[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: unused import: `H1024`
[INFO] [stderr]   --> src/lib.rs:17:14
[INFO] [stderr]    |
[INFO] [stderr] 17 | use bigint::{H1024, U256, H256, H64, H512};
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:22:35
[INFO] [stderr]    |
[INFO] [stderr] 22 | const DATASET_BYTES_INIT: usize = 1073741824; // 2 to the power of 30.
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: consider: `1_073_741_824`
[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/lib.rs:23:37
[INFO] [stderr]    |
[INFO] [stderr] 23 | const DATASET_BYTES_GROWTH: usize = 8388608; // 2 to the power of 23.
[INFO] [stderr]    |                                     ^^^^^^^ help: consider: `8_388_608`
[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/lib.rs:24:33
[INFO] [stderr]    |
[INFO] [stderr] 24 | const CACHE_BYTES_INIT: usize = 16777216; // 2 to the power of 24.
[INFO] [stderr]    |                                 ^^^^^^^^ help: consider: `16_777_216`
[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/lib.rs:25:35
[INFO] [stderr]    |
[INFO] [stderr] 25 | const CACHE_BYTES_GROWTH: usize = 131072; // 2 to the power of 17.
[INFO] [stderr]    |                                   ^^^^^^ help: consider: `131_072`
[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/lib.rs:99:24
[INFO] [stderr]    |
[INFO] [stderr] 99 | const FNV_PRIME: u32 = 0x01000193;
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider: `0x0100_0193`
[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: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(v1 * 0x01000000) | 0`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::precedence)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:104:14
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |              ^^^^^^^^^^ help: consider: `0x0100_0000`
[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: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:104:33
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(v1 * 0x193) | 0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 | /     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 | |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     | |___________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] help: consider parenthesizing your expression
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 |         (a[2] as u32) << (16 + (a[3] as u32)) << 24
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 | /     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 | |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] help: consider parenthesizing your expression
[INFO] [stderr]     |
[INFO] [stderr] 137 |     ((a[0] as u32) + (a[1] as u32)) << (8 +
[INFO] [stderr] 138 |         (a[2] as u32)) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a32`
[INFO] [stderr]    --> src/lib.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |         let a32 = (&a[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_a32` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b32`
[INFO] [stderr]    --> src/lib.rs:112:13
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let b32 = (&b[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_b32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a32`
[INFO] [stderr]    --> src/lib.rs:125:13
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let a32 = (&a[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_a32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b32`
[INFO] [stderr]    --> src/lib.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let b32 = (&b[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_b32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/lib.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |     let n = a.len();
[INFO] [stderr]     |         ^ help: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:307:9
[INFO] [stderr]     |
[INFO] [stderr] 307 |     for i in 0..epoch {
[INFO] [stderr]     |         ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache_size`
[INFO] [stderr]   --> src/dag.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     cache_size: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CACHE_MULTIPLIER`
[INFO] [stderr]   --> src/lib.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | const CACHE_MULTIPLIER: usize = 1024;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FNV_PRIME`
[INFO] [stderr]   --> src/lib.rs:99:1
[INFO] [stderr]    |
[INFO] [stderr] 99 | const FNV_PRIME: u32 = 0x01000193;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u8s_to_u32`
[INFO] [stderr]    --> src/lib.rs:135:1
[INFO] [stderr]     |
[INFO] [stderr] 135 | fn u8s_to_u32(a: &[u8]) -> u32 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: slow zero-filling initialization
[INFO] [stderr]   --> src/dag.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let mut cache: Vec<u8> = Vec::with_capacity(cache_size);
[INFO] [stderr]    |                                  ------------------------------ help: consider replace allocation with: `vec![0; cache_size]`
[INFO] [stderr] 29 |         cache.resize(cache_size, 0);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::slow_vector_initialization)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#slow_vector_initialization
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:101:14
[INFO] [stderr]     |
[INFO] [stderr] 101 |     let v1 = v1 as u64;
[INFO] [stderr]     |              ^^^^^^^^^ help: try: `u64::from(v1)`
[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/lib.rs:102:14
[INFO] [stderr]     |
[INFO] [stderr] 102 |     let v2 = v2 as u64;
[INFO] [stderr]     |              ^^^^^^^^^ help: try: `u64::from(v2)`
[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: the operation is ineffective. Consider reducing it to `(((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2)`
[INFO] [stderr]    --> src/lib.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: the operation is ineffective. Consider reducing it to `v1 * 0x01000000`
[INFO] [stderr]    --> src/lib.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: the operation is ineffective. Consider reducing it to `v1 * 0x193`
[INFO] [stderr]    --> src/lib.rs:104:32
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 | /         (&mut r[j..]).write_u32::<LittleEndian>(
[INFO] [stderr] 115 | |             fnv((&a[j..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr] 116 | |                 (&b[j..]).read_u32::<LittleEndian>().unwrap()));
[INFO] [stderr]     | |________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 | /         (&mut r[j..]).write_u32::<LittleEndian>(
[INFO] [stderr] 129 | |             fnv((&a[j..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr] 130 | |                 (&b[j..]).read_u32::<LittleEndian>().unwrap()));
[INFO] [stderr]     | |________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: try: `u32::from(a[0])`
[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/lib.rs:137:21
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: try: `u32::from(a[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: try: `u32::from(a[2])`
[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/lib.rs:138:31
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |                               ^^^^^^^^^^^^^ help: try: `u32::from(a[3])`
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 |     mix.as_mut().write_u32::<LittleEndian>(mix_first32);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/lib.rs:155:18
[INFO] [stderr]     |
[INFO] [stderr] 155 |         for j in 0..64 {
[INFO] [stderr]     |                  ^^^^^ help: try replacing the loop by: `remix[..64].clone_from_slice(&mix[..64])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         (&mut cmix[j..]).write_u32::<LittleEndian>(c);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:308:22
[INFO] [stderr]     |
[INFO] [stderr] 308 |         fill_sha256(&s.clone(), &mut s, 0);
[INFO] [stderr]     |                      ^^^^^^^^^ help: try removing the `clone` call: `s`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr]     Checking ethereum-block v0.3.5
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/miller_rabin.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let t = (x as isize >> 63) as usize;
[INFO] [stderr]    |             ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::many_single_char_names)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]   --> src/lib.rs:91:21
[INFO] [stderr]    |
[INFO] [stderr] 91 |                 let b = cache[v * 64 + j];
[INFO] [stderr]    |                     ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:215:17
[INFO] [stderr]     |
[INFO] [stderr] 215 |             let v = lookup(p + j);
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:225:13
[INFO] [stderr]     |
[INFO] [stderr] 225 |         let a = fnv((&mix[(j * 4)..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 6th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:227:13
[INFO] [stderr]     |
[INFO] [stderr] 227 |         let b = fnv(a, (&mix[((j + 2) * 4)..]).read_u32::<LittleEndian>().unwrap());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 7th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:228:13
[INFO] [stderr]     |
[INFO] [stderr] 228 |         let c = fnv(b, (&mix[((j + 3) * 4)..]).read_u32::<LittleEndian>().unwrap());
[INFO] [stderr]     |             ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: 5th binding whose name is just one char
[INFO] [stderr]    --> src/lib.rs:237:17
[INFO] [stderr]     |
[INFO] [stderr] 237 |         let mut z = [0u8; 32];
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#many_single_char_names
[INFO] [stderr] 
[INFO] [stderr] warning: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:84:18
[INFO] [stderr]    |
[INFO] [stderr] 84 |     const HINT: &'static [usize] = &[2];
[INFO] [stderr]    |                 -^^^^^^^-------- help: consider removing `'static`: `&[usize]`
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:90:23
[INFO] [stderr]    |
[INFO] [stderr] 90 |     const WITNESSES: &'static [(usize, &'static [usize])] =
[INFO] [stderr]    |                      -^^^^^^^---------------------------- help: consider removing `'static`: `&[(usize, &'static [usize])]`
[INFO] [stderr]    |
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/miller_rabin.rs:90:41
[INFO] [stderr]    |
[INFO] [stderr] 90 |     const WITNESSES: &'static [(usize, &'static [usize])] =
[INFO] [stderr]    |                                        -^^^^^^^-------- help: consider removing `'static`: `&[usize]`
[INFO] [stderr]    |
[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: long literal lacking separators
[INFO] [stderr]   --> src/miller_rabin.rs:96:46
[INFO] [stderr]    |
[INFO] [stderr] 96 |             (1_112_004_669_632, &[2, 13, 23, 1662803]),
[INFO] [stderr]    |                                              ^^^^^^^ help: consider: `1_662_803`
[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: unused import: `H1024`
[INFO] [stderr]   --> src/lib.rs:17:14
[INFO] [stderr]    |
[INFO] [stderr] 17 | use bigint::{H1024, U256, H256, H64, H512};
[INFO] [stderr]    |              ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/lib.rs:22:35
[INFO] [stderr]    |
[INFO] [stderr] 22 | const DATASET_BYTES_INIT: usize = 1073741824; // 2 to the power of 30.
[INFO] [stderr]    |                                   ^^^^^^^^^^ help: consider: `1_073_741_824`
[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/lib.rs:23:37
[INFO] [stderr]    |
[INFO] [stderr] 23 | const DATASET_BYTES_GROWTH: usize = 8388608; // 2 to the power of 23.
[INFO] [stderr]    |                                     ^^^^^^^ help: consider: `8_388_608`
[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/lib.rs:24:33
[INFO] [stderr]    |
[INFO] [stderr] 24 | const CACHE_BYTES_INIT: usize = 16777216; // 2 to the power of 24.
[INFO] [stderr]    |                                 ^^^^^^^^ help: consider: `16_777_216`
[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/lib.rs:25:35
[INFO] [stderr]    |
[INFO] [stderr] 25 | const CACHE_BYTES_GROWTH: usize = 131072; // 2 to the power of 17.
[INFO] [stderr]    |                                   ^^^^^^ help: consider: `131_072`
[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/lib.rs:99:24
[INFO] [stderr]    |
[INFO] [stderr] 99 | const FNV_PRIME: u32 = 0x01000193;
[INFO] [stderr]    |                        ^^^^^^^^^^ help: consider: `0x0100_0193`
[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: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(v1 * 0x01000000) | 0`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::precedence)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]    --> src/lib.rs:104:14
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |              ^^^^^^^^^^ help: consider: `0x0100_0000`
[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: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:104:33
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[INFO] [stderr]     |                                 ^^^^^^^^^^^^^^ help: consider parenthesizing your expression: `(v1 * 0x193) | 0`
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 | /     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 | |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     | |___________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] help: consider parenthesizing your expression
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 |         (a[2] as u32) << (16 + (a[3] as u32)) << 24
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: operator precedence can trip the unwary
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 | /     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr] 138 | |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     | |_____________________^
[INFO] [stderr]     |
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#precedence
[INFO] [stderr] help: consider parenthesizing your expression
[INFO] [stderr]     |
[INFO] [stderr] 137 |     ((a[0] as u32) + (a[1] as u32)) << (8 +
[INFO] [stderr] 138 |         (a[2] as u32)) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a32`
[INFO] [stderr]    --> src/lib.rs:111:13
[INFO] [stderr]     |
[INFO] [stderr] 111 |         let a32 = (&a[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_a32` instead
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b32`
[INFO] [stderr]    --> src/lib.rs:112:13
[INFO] [stderr]     |
[INFO] [stderr] 112 |         let b32 = (&b[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_b32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a32`
[INFO] [stderr]    --> src/lib.rs:125:13
[INFO] [stderr]     |
[INFO] [stderr] 125 |         let a32 = (&a[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_a32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b32`
[INFO] [stderr]    --> src/lib.rs:126:13
[INFO] [stderr]     |
[INFO] [stderr] 126 |         let b32 = (&b[j..]).read_u32::<LittleEndian>().unwrap();
[INFO] [stderr]     |             ^^^ help: consider using `_b32` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `n`
[INFO] [stderr]    --> src/lib.rs:136:9
[INFO] [stderr]     |
[INFO] [stderr] 136 |     let n = a.len();
[INFO] [stderr]     |         ^ help: consider using `_n` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:307:9
[INFO] [stderr]     |
[INFO] [stderr] 307 |     for i in 0..epoch {
[INFO] [stderr]     |         ^ help: consider using `_i` instead
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `cache_size`
[INFO] [stderr]   --> src/dag.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     cache_size: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `CACHE_MULTIPLIER`
[INFO] [stderr]   --> src/lib.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | const CACHE_MULTIPLIER: usize = 1024;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FNV_PRIME`
[INFO] [stderr]   --> src/lib.rs:99:1
[INFO] [stderr]    |
[INFO] [stderr] 99 | const FNV_PRIME: u32 = 0x01000193;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `u8s_to_u32`
[INFO] [stderr]    --> src/lib.rs:135:1
[INFO] [stderr]     |
[INFO] [stderr] 135 | fn u8s_to_u32(a: &[u8]) -> u32 {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: slow zero-filling initialization
[INFO] [stderr]   --> src/dag.rs:29:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |         let mut cache: Vec<u8> = Vec::with_capacity(cache_size);
[INFO] [stderr]    |                                  ------------------------------ help: consider replace allocation with: `vec![0; cache_size]`
[INFO] [stderr] 29 |         cache.resize(cache_size, 0);
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::slow_vector_initialization)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#slow_vector_initialization
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:101:14
[INFO] [stderr]     |
[INFO] [stderr] 101 |     let v1 = v1 as u64;
[INFO] [stderr]     |              ^^^^^^^^^ help: try: `u64::from(v1)`
[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/lib.rs:102:14
[INFO] [stderr]     |
[INFO] [stderr] 102 |     let v2 = v2 as u64;
[INFO] [stderr]     |              ^^^^^^^^^ help: try: `u64::from(v2)`
[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: the operation is ineffective. Consider reducing it to `(((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2)`
[INFO] [stderr]    --> src/lib.rs:104:5
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: the operation is ineffective. Consider reducing it to `v1 * 0x01000000`
[INFO] [stderr]    --> src/lib.rs:104:8
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: the operation is ineffective. Consider reducing it to `v1 * 0x193`
[INFO] [stderr]    --> src/lib.rs:104:32
[INFO] [stderr]     |
[INFO] [stderr] 104 |     ((((v1 * 0x01000000 | 0) + (v1 * 0x193 | 0)) ^ v2) >> 0) as u32
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:114:9
[INFO] [stderr]     |
[INFO] [stderr] 114 | /         (&mut r[j..]).write_u32::<LittleEndian>(
[INFO] [stderr] 115 | |             fnv((&a[j..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr] 116 | |                 (&b[j..]).read_u32::<LittleEndian>().unwrap()));
[INFO] [stderr]     | |________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:128:9
[INFO] [stderr]     |
[INFO] [stderr] 128 | /         (&mut r[j..]).write_u32::<LittleEndian>(
[INFO] [stderr] 129 | |             fnv((&a[j..]).read_u32::<LittleEndian>().unwrap(),
[INFO] [stderr] 130 | |                 (&b[j..]).read_u32::<LittleEndian>().unwrap()));
[INFO] [stderr]     | |________________________________________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:137:5
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr]     |     ^^^^^^^^^^^^^ help: try: `u32::from(a[0])`
[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/lib.rs:137:21
[INFO] [stderr]     |
[INFO] [stderr] 137 |     (a[0] as u32) + (a[1] as u32) << 8 +
[INFO] [stderr]     |                     ^^^^^^^^^^^^^ help: try: `u32::from(a[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: casting u8 to u32 may become silently lossy if types change
[INFO] [stderr]    --> src/lib.rs:138:9
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |         ^^^^^^^^^^^^^ help: try: `u32::from(a[2])`
[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/lib.rs:138:31
[INFO] [stderr]     |
[INFO] [stderr] 138 |         (a[2] as u32) << 16 + (a[3] as u32) << 24
[INFO] [stderr]     |                               ^^^^^^^^^^^^^ help: try: `u32::from(a[3])`
[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: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:152:5
[INFO] [stderr]     |
[INFO] [stderr] 152 |     mix.as_mut().write_u32::<LittleEndian>(mix_first32);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: it looks like you're manually copying between slices
[INFO] [stderr]    --> src/lib.rs:155:18
[INFO] [stderr]     |
[INFO] [stderr] 155 |         for j in 0..64 {
[INFO] [stderr]     |                  ^^^^^ help: try replacing the loop by: `remix[..64].clone_from_slice(&mix[..64])`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::manual_memcpy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_memcpy
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:230:9
[INFO] [stderr]     |
[INFO] [stderr] 230 |         (&mut cmix[j..]).write_u32::<LittleEndian>(c);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: using `clone` on a `Copy` type
[INFO] [stderr]    --> src/lib.rs:308:22
[INFO] [stderr]     |
[INFO] [stderr] 308 |         fill_sha256(&s.clone(), &mut s, 0);
[INFO] [stderr]     |                      ^^^^^^^^^ help: try removing the `clone` call: `s`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::clone_on_copy)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#clone_on_copy
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `blockchain::chain::HeaderHash`
[INFO] [stderr]   --> tests/headers.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use blockchain::chain::HeaderHash;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> tests/headers.rs:24:39
[INFO] [stderr]    |
[INFO] [stderr] 24 |     assert_eq!(get_cache_size(epoch), 16776896);
[INFO] [stderr]    |                                       ^^^^^^^^ help: consider: `16_776_896`
[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]   --> tests/headers.rs:25:38
[INFO] [stderr]    |
[INFO] [stderr] 25 |     assert_eq!(get_full_size(epoch), 1073739904);
[INFO] [stderr]    |                                      ^^^^^^^^^^ help: consider: `1_073_739_904`
[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]   --> tests/headers.rs:55:39
[INFO] [stderr]    |
[INFO] [stderr] 55 |     assert_eq!(get_cache_size(epoch), 16776896);
[INFO] [stderr]    |                                       ^^^^^^^^ help: consider: `16_776_896`
[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]   --> tests/headers.rs:56:38
[INFO] [stderr]    |
[INFO] [stderr] 56 |     assert_eq!(get_full_size(epoch), 1073739904);
[INFO] [stderr]    |                                      ^^^^^^^^^^ help: consider: `1_073_739_904`
[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: slow zero-filling initialization
[INFO] [stderr]   --> tests/headers.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 31 |     let mut cache: Vec<u8> = Vec::with_capacity(cache_size);
[INFO] [stderr]    |                              ------------------------------ help: consider replace allocation with: `vec![0; cache_size]`
[INFO] [stderr] 32 |     cache.resize(cache_size, 0);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::slow_vector_initialization)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#slow_vector_initialization
[INFO] [stderr] 
[INFO] [stderr] warning: slow zero-filling initialization
[INFO] [stderr]   --> tests/headers.rs:63:5
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let mut cache: Vec<u8> = Vec::with_capacity(cache_size);
[INFO] [stderr]    |                              ------------------------------ help: consider replace allocation with: `vec![0; cache_size]`
[INFO] [stderr] 63 |     cache.resize(cache_size, 0);
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#slow_vector_initialization
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.88s
[INFO] running `"docker" "inspect" "e8a5b725d9ca1a9bded360b326130c982ce7e04a26991e5144e2a5d4718ced7a"`
[INFO] running `"docker" "rm" "-f" "e8a5b725d9ca1a9bded360b326130c982ce7e04a26991e5144e2a5d4718ced7a"`
[INFO] [stdout] e8a5b725d9ca1a9bded360b326130c982ce7e04a26991e5144e2a5d4718ced7a