[INFO] updating cached repository nherson/euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nherson/euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nherson/euler-rust" "work/ex/clippy-test-run/sources/stable/gh/nherson/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/nherson/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nherson/euler-rust" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nherson/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nherson/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 54c3a153e5cd345c0d2a4ea1731a998fe8a82cdf
[INFO] sha for GitHub repo nherson/euler-rust: 54c3a153e5cd345c0d2a4ea1731a998fe8a82cdf
[INFO] validating manifest of nherson/euler-rust on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of nherson/euler-rust on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing nherson/euler-rust
[INFO] finished frobbing nherson/euler-rust
[INFO] frobbed toml for nherson/euler-rust written to work/ex/clippy-test-run/sources/stable/gh/nherson/euler-rust/Cargo.toml
[INFO] started frobbing nherson/euler-rust
[INFO] finished frobbing nherson/euler-rust
[INFO] frobbed toml for nherson/euler-rust written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/nherson/euler-rust/Cargo.toml
[INFO] crate nherson/euler-rust has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting nherson/euler-rust against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/nherson/euler-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 322f159e8441fb17d6f58fc97e8d9f143c4c7067edc13db9d8e2ac108abb60fd
[INFO] running `"docker" "start" "-a" "322f159e8441fb17d6f58fc97e8d9f143c4c7067edc13db9d8e2ac108abb60fd"`
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking regex v0.1.80
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]     Checking euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/problem14.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         return self.map.iter();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.map.iter()`
[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: long literal lacking separators
[INFO] [stderr]   --> src/problem14.rs:77:17
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for i in 1..1000000 {
[INFO] [stderr]    |                 ^^^^^^^ help: consider: `1_000_000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/problem14.rs:84:19
[INFO] [stderr]    |
[INFO] [stderr] 84 |         if *num < 1000000 && *chain_length > max_chain {
[INFO] [stderr]    |                   ^^^^^^^ help: consider: `1_000_000`
[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/problem14.rs:88:20
[INFO] [stderr]    |
[INFO] [stderr] 88 |         if *num == 999999 {
[INFO] [stderr]    |                    ^^^^^^ help: consider: `999_999`
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/main.rs:13:15
[INFO] [stderr]    |
[INFO] [stderr] 13 | const USAGE: &'static str = "
[INFO] [stderr]    |              -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/problem14.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |         return self.map.iter();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `self.map.iter()`
[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: long literal lacking separators
[INFO] [stderr]   --> src/problem14.rs:77:17
[INFO] [stderr]    |
[INFO] [stderr] 77 |     for i in 1..1000000 {
[INFO] [stderr]    |                 ^^^^^^^ help: consider: `1_000_000`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unreadable_literal)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unreadable_literal
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/problem14.rs:84:19
[INFO] [stderr]    |
[INFO] [stderr] 84 |         if *num < 1000000 && *chain_length > max_chain {
[INFO] [stderr]    |                   ^^^^^^^ help: consider: `1_000_000`
[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/problem14.rs:88:20
[INFO] [stderr]    |
[INFO] [stderr] 88 |         if *num == 999999 {
[INFO] [stderr]    |                    ^^^^^^ help: consider: `999_999`
[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: Constants have by default a `'static` lifetime
[INFO] [stderr]   --> src/main.rs:13:15
[INFO] [stderr]    |
[INFO] [stderr] 13 | const USAGE: &'static str = "
[INFO] [stderr]    |              -^^^^^^^---- help: consider removing `'static`: `&str`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::const_static_lifetime)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#const_static_lifetime
[INFO] [stderr] 
[INFO] [stderr] warning: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/problem4.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn is_palindrome(n: &i32) -> bool {
[INFO] [stderr]    |                     ^^^^ help: consider passing by value instead: `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] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/problem7.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         x = x + 1;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `x += 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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/problem7.rs:40:29
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn is_prime(n: i32, primes: &Vec<i32>) -> bool {
[INFO] [stderr]    |                             ^^^^^^^^^ help: change this to: `&[i32]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/problem8.rs:81:41
[INFO] [stderr]    |
[INFO] [stderr] 81 |         product_digits[i%window_size] = current_digit as u64;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(current_digit)`
[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: the loop variable `i` is only used to index `digits`.
[INFO] [stderr]    --> src/problem8.rs:105:14
[INFO] [stderr]     |
[INFO] [stderr] 105 |     for i in 0..digits.len() {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 105 |     for <item> in &digits {
[INFO] [stderr]     |         ^^^^^^    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/problem8.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |         product = product * digits[i] as u64
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `product *= digits[i] as u64`
[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: unused label `'inc_bc`
[INFO] [stderr]   --> src/problem9.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 | /             'inc_bc: while c.pow(2)-b.pow(2) != a.pow(2) {
[INFO] [stderr] 47 | |                 // Slide our consecutive squares over by 1
[INFO] [stderr] 48 | |                 b = b + 1;
[INFO] [stderr] 49 | |                 c = c + 1;
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |                 }
[INFO] [stderr] 56 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/problem9.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             a = a + 2;
[INFO] [stderr]    |             ^^^^^^^^^ help: replace it with: `a += 2`
[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/problem9.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 b = b + 1;
[INFO] [stderr]    |                 ^^^^^^^^^ help: replace it with: `b += 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/problem9.rs:49:17
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 c = c + 1;
[INFO] [stderr]    |                 ^^^^^^^^^ help: replace it with: `c += 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/problem9.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         s = s + 1;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `s += 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: this argument is passed by reference, but would be more efficient if passed by value
[INFO] [stderr]   --> src/problem4.rs:27:21
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn is_palindrome(n: &i32) -> bool {
[INFO] [stderr]    |                     ^^^^ help: consider passing by value instead: `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] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/problem7.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |         x = x + 1;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `x += 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: writing `&Vec<_>` instead of `&[_]` involves one more reference and cannot be used with non-Vec-based slices.
[INFO] [stderr]   --> src/problem7.rs:40:29
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn is_prime(n: i32, primes: &Vec<i32>) -> bool {
[INFO] [stderr]    |                             ^^^^^^^^^ help: change this to: `&[i32]`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ptr_arg)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to u64 may become silently lossy if types change
[INFO] [stderr]   --> src/problem8.rs:81:41
[INFO] [stderr]    |
[INFO] [stderr] 81 |         product_digits[i%window_size] = current_digit as u64;
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^ help: try: `u64::from(current_digit)`
[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: the loop variable `i` is only used to index `digits`.
[INFO] [stderr]    --> src/problem8.rs:105:14
[INFO] [stderr]     |
[INFO] [stderr] 105 |     for i in 0..digits.len() {
[INFO] [stderr]     |              ^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::needless_range_loop)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_range_loop
[INFO] [stderr] help: consider using an iterator
[INFO] [stderr]     |
[INFO] [stderr] 105 |     for <item> in &digits {
[INFO] [stderr]     |         ^^^^^^    ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]    --> src/problem8.rs:106:9
[INFO] [stderr]     |
[INFO] [stderr] 106 |         product = product * digits[i] as u64
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `product *= digits[i] as u64`
[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: unused label `'inc_bc`
[INFO] [stderr]   --> src/problem9.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 | /             'inc_bc: while c.pow(2)-b.pow(2) != a.pow(2) {
[INFO] [stderr] 47 | |                 // Slide our consecutive squares over by 1
[INFO] [stderr] 48 | |                 b = b + 1;
[INFO] [stderr] 49 | |                 c = c + 1;
[INFO] [stderr] ...  |
[INFO] [stderr] 55 | |                 }
[INFO] [stderr] 56 | |             }
[INFO] [stderr]    | |_____________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_label)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_label
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/problem9.rs:43:13
[INFO] [stderr]    |
[INFO] [stderr] 43 |             a = a + 2;
[INFO] [stderr]    |             ^^^^^^^^^ help: replace it with: `a += 2`
[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/problem9.rs:48:17
[INFO] [stderr]    |
[INFO] [stderr] 48 |                 b = b + 1;
[INFO] [stderr]    |                 ^^^^^^^^^ help: replace it with: `b += 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/problem9.rs:49:17
[INFO] [stderr]    |
[INFO] [stderr] 49 |                 c = c + 1;
[INFO] [stderr]    |                 ^^^^^^^^^ help: replace it with: `c += 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/problem9.rs:63:9
[INFO] [stderr]    |
[INFO] [stderr] 63 |         s = s + 1;
[INFO] [stderr]    |         ^^^^^^^^^ help: replace it with: `s += 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]     Finished dev [unoptimized + debuginfo] target(s) in 6.67s
[INFO] running `"docker" "inspect" "322f159e8441fb17d6f58fc97e8d9f143c4c7067edc13db9d8e2ac108abb60fd"`
[INFO] running `"docker" "rm" "-f" "322f159e8441fb17d6f58fc97e8d9f143c4c7067edc13db9d8e2ac108abb60fd"`
[INFO] [stdout] 322f159e8441fb17d6f58fc97e8d9f143c4c7067edc13db9d8e2ac108abb60fd