[INFO] updating cached repository simicic/project_euler
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/simicic/project_euler
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/simicic/project_euler" "work/ex/clippy-test-run/sources/stable/gh/simicic/project_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/simicic/project_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/simicic/project_euler" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/simicic/project_euler"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/simicic/project_euler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2962c693cbd77d7a56698677b3aac0423b4cba02
[INFO] sha for GitHub repo simicic/project_euler: 2962c693cbd77d7a56698677b3aac0423b4cba02
[INFO] validating manifest of simicic/project_euler 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 simicic/project_euler 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 simicic/project_euler
[INFO] finished frobbing simicic/project_euler
[INFO] frobbed toml for simicic/project_euler written to work/ex/clippy-test-run/sources/stable/gh/simicic/project_euler/Cargo.toml
[INFO] started frobbing simicic/project_euler
[INFO] finished frobbing simicic/project_euler
[INFO] frobbed toml for simicic/project_euler written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/simicic/project_euler/Cargo.toml
[INFO] crate simicic/project_euler 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 simicic/project_euler against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-4/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/simicic/project_euler:/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] af524b48c1402688e198e0510a95ff8eb09b267e92c208506cd81a7197599848
[INFO] running `"docker" "start" "-a" "af524b48c1402688e198e0510a95ff8eb09b267e92c208506cd81a7197599848"`
[INFO] [stderr]     Checking project_euler v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/assignments/simple_euler.rs:29:24
[INFO] [stderr]    |
[INFO] [stderr] 29 |     if future_number > 4000000 {
[INFO] [stderr]    |                        ^^^^^^^ help: consider: `4_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: this if statement can be collapsed
[INFO] [stderr]   --> src/assignments/simple_euler.rs:71:7
[INFO] [stderr]    |
[INFO] [stderr] 71 | /       if is_palindrome(potential_palindrome) {
[INFO] [stderr] 72 | |         if potential_palindrome > biggest_palindrome {
[INFO] [stderr] 73 | |           biggest_palindrome = potential_palindrome;
[INFO] [stderr] 74 | |         }
[INFO] [stderr] 75 | |       }
[INFO] [stderr]    | |_______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 71 |       if is_palindrome(potential_palindrome) && potential_palindrome > biggest_palindrome {
[INFO] [stderr] 72 |   biggest_palindrome = potential_palindrome;
[INFO] [stderr] 73 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/assignments/simple_euler.rs:124:3
[INFO] [stderr]     |
[INFO] [stderr] 124 |   return true;
[INFO] [stderr]     |   ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/assignments/simple_euler.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         result = result + current_number;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `result += current_number`
[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/assignments/simple_euler.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         result = result + future_number;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `result += future_number`
[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/assignments/simple_euler.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     divided_number = divided_number / latest_divisable;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `divided_number /= latest_divisable`
[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 `'inner`
[INFO] [stderr]   --> src/assignments/simple_euler.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | /     'inner: for second_factor in (first_factor..999).rev() {
[INFO] [stderr] 69 | |       let potential_palindrome = first_factor * second_factor;
[INFO] [stderr] 70 | |
[INFO] [stderr] 71 | |       if is_palindrome(potential_palindrome) {
[INFO] [stderr] ...  |
[INFO] [stderr] 75 | |       }
[INFO] [stderr] 76 | |     }
[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: unused label `'outer`
[INFO] [stderr]   --> src/assignments/simple_euler.rs:67:3
[INFO] [stderr]    |
[INFO] [stderr] 67 | /   'outer: for first_factor in (100..999).rev() {
[INFO] [stderr] 68 | |     'inner: for second_factor in (first_factor..999).rev() {
[INFO] [stderr] 69 | |       let potential_palindrome = first_factor * second_factor;
[INFO] [stderr] 70 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 76 | |     }
[INFO] [stderr] 77 | |   }
[INFO] [stderr]    | |___^
[INFO] [stderr]    |
[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/assignments/simple_euler.rs:88:7
[INFO] [stderr]    |
[INFO] [stderr] 88 |       increment = increment * prime;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `increment *= prime`
[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: long literal lacking separators
[INFO] [stderr]   --> src/assignments/simple_euler.rs:29:24
[INFO] [stderr]    |
[INFO] [stderr] 29 |     if future_number > 4000000 {
[INFO] [stderr]    |                        ^^^^^^^ help: consider: `4_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: this if statement can be collapsed
[INFO] [stderr]   --> src/assignments/simple_euler.rs:71:7
[INFO] [stderr]    |
[INFO] [stderr] 71 | /       if is_palindrome(potential_palindrome) {
[INFO] [stderr] 72 | |         if potential_palindrome > biggest_palindrome {
[INFO] [stderr] 73 | |           biggest_palindrome = potential_palindrome;
[INFO] [stderr] 74 | |         }
[INFO] [stderr] 75 | |       }
[INFO] [stderr]    | |_______^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::collapsible_if)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_if
[INFO] [stderr] help: try
[INFO] [stderr]    |
[INFO] [stderr] 71 |       if is_palindrome(potential_palindrome) && potential_palindrome > biggest_palindrome {
[INFO] [stderr] 72 |   biggest_palindrome = potential_palindrome;
[INFO] [stderr] 73 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/assignments/simple_euler.rs:124:3
[INFO] [stderr]     |
[INFO] [stderr] 124 |   return true;
[INFO] [stderr]     |   ^^^^^^^^^^^^ help: remove `return` as shown: `true`
[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: manual implementation of an assign operation
[INFO] [stderr]   --> src/assignments/simple_euler.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |         result = result + current_number;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `result += current_number`
[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/assignments/simple_euler.rs:33:9
[INFO] [stderr]    |
[INFO] [stderr] 33 |         result = result + future_number;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `result += future_number`
[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/assignments/simple_euler.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     divided_number = divided_number / latest_divisable;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `divided_number /= latest_divisable`
[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 `'inner`
[INFO] [stderr]   --> src/assignments/simple_euler.rs:68:5
[INFO] [stderr]    |
[INFO] [stderr] 68 | /     'inner: for second_factor in (first_factor..999).rev() {
[INFO] [stderr] 69 | |       let potential_palindrome = first_factor * second_factor;
[INFO] [stderr] 70 | |
[INFO] [stderr] 71 | |       if is_palindrome(potential_palindrome) {
[INFO] [stderr] ...  |
[INFO] [stderr] 75 | |       }
[INFO] [stderr] 76 | |     }
[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: unused label `'outer`
[INFO] [stderr]   --> src/assignments/simple_euler.rs:67:3
[INFO] [stderr]    |
[INFO] [stderr] 67 | /   'outer: for first_factor in (100..999).rev() {
[INFO] [stderr] 68 | |     'inner: for second_factor in (first_factor..999).rev() {
[INFO] [stderr] 69 | |       let potential_palindrome = first_factor * second_factor;
[INFO] [stderr] 70 | |
[INFO] [stderr] ...  |
[INFO] [stderr] 76 | |     }
[INFO] [stderr] 77 | |   }
[INFO] [stderr]    | |___^
[INFO] [stderr]    |
[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/assignments/simple_euler.rs:88:7
[INFO] [stderr]    |
[INFO] [stderr] 88 |       increment = increment * prime;
[INFO] [stderr]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace it with: `increment *= prime`
[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: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:24:65
[INFO] [stderr]    |
[INFO] [stderr] 24 |     "3" => lib::assignments::simple_euler::largest_prime_factor(600851475143),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^^ help: consider: `600_851_475_143`
[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: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
[INFO] [stderr]   --> src/main.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 | /   io::stdin().read_line(&mut challenge_code)
[INFO] [stderr] 16 | |       .ok()
[INFO] [stderr] 17 | |       .expect("Couldn't read the line!");
[INFO] [stderr]    | |________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ok_expect)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ok_expect
[INFO] [stderr] 
[INFO] [stderr] warning: long literal lacking separators
[INFO] [stderr]   --> src/main.rs:24:65
[INFO] [stderr]    |
[INFO] [stderr] 24 |     "3" => lib::assignments::simple_euler::largest_prime_factor(600851475143),
[INFO] [stderr]    |                                                                 ^^^^^^^^^^^^ help: consider: `600_851_475_143`
[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: called `ok().expect()` on a Result value. You can call `expect` directly on the `Result`
[INFO] [stderr]   --> src/main.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 | /   io::stdin().read_line(&mut challenge_code)
[INFO] [stderr] 16 | |       .ok()
[INFO] [stderr] 17 | |       .expect("Couldn't read the line!");
[INFO] [stderr]    | |________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::ok_expect)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ok_expect
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.50s
[INFO] running `"docker" "inspect" "af524b48c1402688e198e0510a95ff8eb09b267e92c208506cd81a7197599848"`
[INFO] running `"docker" "rm" "-f" "af524b48c1402688e198e0510a95ff8eb09b267e92c208506cd81a7197599848"`
[INFO] [stdout] af524b48c1402688e198e0510a95ff8eb09b267e92c208506cd81a7197599848